N950N Olympics edition having trouble on TMobile - Samsung Galaxy Note 8 Questions and Answers

Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!

I dont know how your carrier handles VOLTE, but my carrier requested me to go in person and there they activated the service

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Hey There,
I'm glad to stumble upon an actual user of an Olympic edition.
Would you mind installing Samsung PhoneInfo app from playstore and sharing your current CSC Code, and your Device Model number - which I assume is N950N ?
I'm just looking for a way to obtain the bootanimation and the theme of it...

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk

Don't want to sell something that has such sentimental value to me

Product code SM-N950NZWZKTC
CSC code KTC

Additionally it doesn't seem to have the ability to have conference calls?

If you enabled all the switches through IMS setting & VoLTE still doesn't work, you'll need T-mobile CSC to get it working. Aside from the IMS settings, there are some VoLTE related settings in cscfeatures.xml. I have a N950F with modified T Mobile CSC, VoLTE, Wifi calling are working fine, I also have the VoLTE quick setting tile. But I'm rooted & is how I installed it
You'll need T Mobile CSC for wfi calling.
---------- Post added at 05:06 PM ---------- Previous post was at 04:56 PM ----------
Limeybastard said:
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
Heck no, I say root it, I'd never trade it for a US Snapdragon but that's just me. Can easily get VoLTE working along with many more features.

shouren04 said:
If you enabled all the switches through IMS setting & VoLTE still doesn't work, you'll need T-mobile CSC to get it working. Aside from the IMS settings, there are some VoLTE related settings in cscfeatures.xml. I have a N950F with modified T Mobile CSC, VoLTE, Wifi calling are working fine, I also have the VoLTE quick setting tile. But I'm rooted & is how I installed it
You'll need T Mobile CSC for wfi calling.
Click to expand...
Click to collapse
Will the Tmobile CSC work on this particular device? Tmobile csc i thought would not work on the 950n's as its not the same hardware?
where can i get the csc?

hgeek23 said:
Will the Tmobile CSC work on this particular device? Tmobile csc i thought would not work on the 950n's as its not the same hardware?
where can i get the csc?
Click to expand...
Click to collapse
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.

Limeybastard said:
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
shouren04 said:
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.
Click to expand...
Click to collapse
I need to flash a new kernel? Firmware? Will this replace the Olympics bootscreen?

@hgeek23 Did you see my PM ? Thanks

hgeek23 said:
I need to flash a new kernel? Firmware? Will this replace the Olympics bootscreen?
Click to expand...
Click to collapse
It won't replace the Olympics boot screen but it will trip Knox & may void warranty (not sure what warranty laws are from the original COO, some countries don't void warranty for tripping Knox). But if you are in the US, you can't claim warranty on the phone in the US anyway.
You'd have to install TWRP & root your phone to install the mod I linked. But being how rare that phone is, I wouldn't do it unless you find a copy of the stock Olympics FW for that phone in case anything happens. Seems like others have been looking for it but can't find it yet. Other say it's just a theme that can be installed but if it has a different boot screen then I doubt it's just a theme for the theme store.

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Maybe you've got the rare paralympic edition of Note8 which isn't capable of it? (I know, tastefully offensive. I'll be going to hell for that joke)
On a serious note, since it's the N950N which is similar to the N950F afaik, you're better off asking TMobile directly about any connectivity issues.
Usually like others have previously mentioned, should be CSC related but f.e. (if I'm not mistaken) due to the OMC folder/ structure, nearly all country CSC are included. Just the CSC features aren't accessible unless you replace the specific CSC with a modified one from S8/S8+.
If TMobile can't fix it or help you out, you're choice would be to root, double check with a N950F/N950N user if they have volte or (someone has to jump in here to verify) try flashing -if available- factory binaries for specifically USA.

I doubt T-Mobile will help or can even do anything being an international phone. My F on T-Mobile USA worked perfectly fine. You don't need IMEI provisioning with T-Mobile USA like you do with some carriers like AT&T. My speeds were great out the box, better than my T-Mobile Note 5, just didn't have VoLTE & Wifi calling until I enabled them w/ root. We now have 2 more Note 8s in the household, U T-Mobile variants. Speeds are pretty much exactly the same as my F.

shouren04 said:
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.
Click to expand...
Click to collapse
Hey there, I thought I recognized the name. Remember me? One of the first to test and rip open the F model to try and figure out the LTE issue / carrier aggregation issue.
I've read through some pages over on the OEM Lock thread ... so to conclude, they figured out the issue with the OEM lock disappearing, but did they ever figure out the carrier aggregation for using F/N model 100% on T-Mobile??
I know people with the F and N models that are still suffering from carrier aggregation and like this Olympic Edition model, which is just a N model with a cool back white Olympic cover. Those who plan to use this on T-Mobile may face the LTE connectivity (carrier aggregation) issue..
For those in really good reception areas may not seem like they have an issue, but that is because they are connected to a really strong (single) signal/frequency, which makes it seem like everything is fine...
Would you be able to provide links to any progress regarding this issue? Has it been solved? If so, it's likely buried in the pages somewhere in the other threads....:highfive:

iunlock said:
Hey there, I thought I recognized the name. Remember me? One of the first to test and rip open the F model to try and figure out the LTE issue / carrier aggregation issue.
I've read through some pages over on the OEM Lock thread ... so to conclude, they figured out the issue with the OEM lock disappearing, but did they ever figure out the carrier aggregation for using F/N model 100% on T-Mobile??
I know people with the F and N models that are still suffering from carrier aggregation and like this Olympic Edition model, which is just a N model with a cool back white Olympic cover. Those who plan to use this on T-Mobile may face the LTE connectivity (carrier aggregation) issue..
For those in really good reception areas may not seem like they have an issue, but that is because they are connected to a really strong (single) signal/frequency, which makes it seem like everything is fine...
Would you be able to provide links to any progress regarding this issue? Has it been solved? If so, it's likely buried in the pages somewhere in the other threads....:highfive:
Click to expand...
Click to collapse
Yes I remember you. I may not be the best guy to answer your questions but I'll share what I remember.
If you remember, I was just about the only guy in those threads that didn't experience any of the issues you guys did. I'm still using an early version of KT's TMO zip which was basically a slightly modified version of tekhd's S8 zip. The versions to follow is when they started changing more & had issues as it was later found out that the TMB_keystrings.dat from N950U was the cause. Once they replaced that file the issues were reported to have been resolved. I think the current version is like 9m or something I like, I'm using 3a & always have been, never tried any later versions & is probably why I never experienced those issues.
At home my reception is not very good nor are speeds, I get 20-40mbps depending on the time of day. This was the same before I used the zip. My CA combos were different than what the zip gave me but I still had the combos that get's used the most in my area. Around town in good areas I can get 80-135mbps. I stopped checking as I put the subject to rest a while ago.
A few months ago my parents both got Tmobile N950Us. I compared my F with the TMO zip & speeds are pretty much the same, sometimes my F is slightly faster, sometimes the U, but not a big difference so I consider that other factors & call them the same. I've even tried a speed test at a local T-mobile store & the speed was like 6mbps (that area I know doesn't have good coverage) on a U where mine was getting just under 20. Still I'm not saying my F is any better but since I was able to test actual T-Mobile U variants, I don't believe my phone to have any issues with speeds & CA in my area.

Yes the Olympics edition is simply an N with a theme applied and physical cover with the logo on it. the bootscreen is an olympics logo etc.
Merging calls doesnt seem possible, i dont know why. LTE frequently drops on Tmobile now and just goes to 3g or no service at all.
Volte not working either.

I had a similar situation. I bought my phone (N950F) from abroad. Although the phone was in the compatible devices list of my carrier company, they told me that VoLTE could not be used on phones taken from abroad (silly reason). VoLTE enable is carried out by sending a request SMS to the carrier. I put my SIM card into a friend's phone, and sent the request through it. My carrier enabled my SIM card. I put it back to my phone and voila! I have been using VoLTE since then without any problem.

Just wanted to post a final kind of update and that is that the above referenced CSC for Tmobile worked well.

Related

Note korean version call issue

Hello all,
anyone with the N version and has call issue like your calls will go straight to vm ?
i called my phone many times and it never rang
maybe i need to flash a different CSC ? I'm not sure
thanks
TheUndertaker21 said:
Hello all,
anyone with the N version and has call issue like your calls will go straight to vm ?
i called my phone many times and it never rang
maybe i need to flash a different CSC ? I'm not sure
thanks
Click to expand...
Click to collapse
Didn't have any issues with mine out of the box or now that I've finally got all the T-Mobile stuff working with it's CSC and apps. I've called out and received calls in both circumstances and had zero issues. What provider are you with here?
Kalm_Traveler said:
Didn't have any issues with mine out of the box or now that I've finally got all the T-Mobile stuff working with it's CSC and apps. I've called out and received calls in both circumstances and had zero issues. What provider are you with here?
Click to expand...
Click to collapse
Mine was some Band LTE I think.
Gonna try your link and see
Edit: your link you gave me fixed the issue.
Thanks.
Sent from my SM-N950F using XDA-Developers Legacy app
Kalm_Traveler said:
Didn't have any issues with mine out of the box or now that I've finally got all the T-Mobile stuff working with it's CSC and apps. I've called out and received calls in both circumstances and had zero issues. What provider are you with here?
Click to expand...
Click to collapse
How did you get the tmobile csc? I was having call issues too but when i changed the ims settings and enabled volte calls got better but when im in a area with bad lte service calls are taking long to go thru. Could that be a csc issue? Also i dont see a link that the op is saying you provided that fixed the problem
AssAssiN FtC said:
How did you get the tmobile csc? I was having call issues too but when i changed the ims settings and enabled volte calls got better but when im in a area with bad lte service calls are taking long to go thru. Could that be a csc issue? Also i dont see a link that the op is saying you provided that fixed the problem
Click to expand...
Click to collapse
Extracted it from the T-mobile ROM and dropped the files into a CSC changer flashable zip for an S8, modified it so it would work on my Note 8 and flashed it.
AssAssiN FtC said:
How did you get the tmobile csc? I was having call issues too but when i changed the ims settings and enabled volte calls got better but when im in a area with bad lte service calls are taking long to go thru. Could that be a csc issue? Also i dont see a link that the op is saying you provided that fixed the problem
Click to expand...
Click to collapse
that was my issue
i spent 45 mns on t mobile call then i realized why i'm calling them since my phone isn't a t mobile one lol
i flashed Kalm file
and that fixed my issue
hopefully the main dev can port it over
i don't think he's gonna be too happy with his file being modified like that
TheUndertaker21 said:
that was my issue
i spent 45 mns on t mobile call then i realized why i'm calling them since my phone isn't a t mobile one lol
i flashed Kalm file
and that fixed my issue
hopefully the main dev can port it over
i don't think he's gonna be too happy with his file being modified like that
Click to expand...
Click to collapse
ah I didn't even think about someone being upset about it. If he is I'll take the link down. I just wanted to share for anyone else in our situation since there is no official Note 8 CSC changer at the moment.
Kalm_Traveler said:
Extracted it from the T-mobile ROM and dropped the files into a CSC changer flashable zip for an S8, modified it so it would work on my Note 8 and flashed it.
Click to expand...
Click to collapse
I found the file in your other thread i just Odin it no root needed right? Thanks in advance
Not Odin, it is a flashable zip so you'll need a custom recovery and probably root
Kalm_Traveler said:
Not Odin, it is a flashable zip so you'll need a custom recovery and probably root
Click to expand...
Click to collapse
Ok cool glad i asked before i did anything lol
Ended up calling t mobile and they had me reset my network settings then turn off my phone while they did something on their end. Turned my phone back on and boom no more problems. Didn't want to try root yet until there was a more stable one available. Thanks for all the help
Kalm_Traveler said:
Not Odin, it is a flashable zip so you'll need a custom recovery and probably root
Click to expand...
Click to collapse
Do you have a link to the CSC file your talking about. I could use it also. I just got my note 8 yesterday from the same place you picked yours up, thanks
gubbilo144 said:
Do you have a link to the CSC file your talking about. I could use it also. I just got my note 8 yesterday from the same place you picked yours up, thanks
Click to expand...
Click to collapse
yeah it's in my thread here https://forum.xda-developers.com/showpost.php?p=73858645&postcount=17
But I redid it last night after someone confirmed that they didn't even need the Note 8 CSC files, and I deleted out everything for other carriers so the new file is only about 120mb instead of 300-something.
I can post that up after work if you want to wait, uploading is blocked here at work for some reason.
Have to add that wifi calling still doesn't seem to be working, but VoLTE does since calling does not drop me from LTE. I have no menu settings for either still, but after doing a full reset, reflashing etc I have the wifi calling quick toggle but it doesn't seem to turn on all the way - the "on" color is light-grey instead of white like everything else (dark grey when off) and in the System UI tuner app, no icon is set for Wifi Calling or VoLTE.
Kalm_Traveler said:
But I redid it last night after someone confirmed that they didn't even need the Note 8 CSC files, and I deleted out everything for other carriers so the new file is only about 120mb instead of 300-something.
I can post that up after work if you want to wait, uploading is blocked here at work for some reason.
Click to expand...
Click to collapse
Howdy. Did you post this anywhere yet? My phone is on it's way. Thanks for the seller tip.
Pinan said:
Howdy. Did you post this anywhere yet? My phone is on it's way. Thanks for the seller tip.
Click to expand...
Click to collapse
Yeah it's in my Exynos T-mobile CSC thread but I've got a better smaller one now. I took a pack that @TEKHD made for the S8+ F variant and switched out the files with Note 8 T-mobile files but there is a little bit left to go to make WiFi Calling work on our N950N, VoLTE works, HD voice works, video calling works, but I'm still trying to figure out what's missing for WiFi calling. It's menu isn't even showing up yet.
Current flashable zip is only 88mb and I'm fairly sure whenever I figure out the remaining files that need to be copied over it won't be much larger.
Kalm_Traveler said:
Yeah it's in my Exynos T-mobile CSC thread but I've got a better smaller one now.
Click to expand...
Click to collapse
Right. The better smaller one is the one I'm looking for. I already had downloaded the older/larger one, then I saw your post.
Is the smaller one available?
Pinan said:
Right. The better smaller one is the one I'm looking for. I already had downloaded the older/larger one, then I saw your post.
Is the smaller one available?
Click to expand...
Click to collapse
I'm about to do a factory Odin flash to stock and test the latest version - if it works properly I'll post it up with a link - though I don't want to step on anyone's toes since the core script and idea belongs to TEKHD.
Fair warning as far as right now I still haven't figured out why WiFi Calling is missing, I set up this the same way he has his S8+ pack for their F variant aside from adding a few framework files that I found referenced in the Tmo Wifi Calling apk that don't exist on a factory Korean N950N but are on the Tmo ROM, and my theory if this next attempt doesn't enable WiFi Calling is that the N950N is fundamentally either just missing more files that need to be in place for it to work and I haven't found them yet, or that it has different/incompatible versions of some files that the T-Mobile Wifi Calling needs to function.
In other words I have 2 more things to test, then I am going to try fully wiping, flashing an N950F-based ROM and apply the T-Mobile WFC pack to that, since the S8/S8+ options that enable it for those folks are for the F variants, not the N variant but the F and N have the same hardware.
Kalm_Traveler said:
I'm about to do a factory Odin flash to stock and test the latest version - if it works properly I'll post it up with a link - though I don't want to step on anyone's toes since the core script and idea belongs to TEKHD.
Fair warning as far as right now I still haven't figured out why WiFi Calling is missing, I set up this the same way he has his S8+ pack for their F variant aside from adding a few framework files that I found referenced in the Tmo Wifi Calling apk that don't exist on a factory Korean N950N but are on the Tmo ROM, and my theory if this next attempt doesn't enable WiFi Calling is that the N950N is fundamentally either just missing more files that need to be in place for it to work and I haven't found them yet, or that it has different/incompatible versions of some files that the T-Mobile Wifi Calling needs to function.
In other words I have 2 more things to test, then I am going to try fully wiping, flashing an N950F-based ROM and apply the T-Mobile WFC pack to that, since the S8/S8+ options that enable it for those folks are for the F variants, not the N variant but the F and N have the same hardware.
Click to expand...
Click to collapse
Sounds good. I went through the same things with my Note 2 years ago. I figured it out and got WiFi Calling working.
Fwiw, I have no interest in Wifi Calling on my Note 8, as my signal (also T-Mobile) is always good, and I use Hangouts (or whatever) when I'm on Wifi, for free calling.
I don't have Note 8 yet, but will order soon from the same seller as you.
Do you have any other suggestions for getting everything up and running for T-Mobile (except WiFi Calling), or is simply flashing the CSC file?
Pinan said:
Sounds good. I went through the same things with my Note 2 years ago. I figured it out and got WiFi Calling working.
Fwiw, I have no interest in Wifi Calling on my Note 8, as my signal (also T-Mobile) is always good, and I use Hangouts (or whatever) when I'm on Wifi, for free calling.
I don't have Note 8 yet, but will order soon from the same seller as you.
Do you have any other suggestions for getting everything up and running for T-Mobile (except WiFi Calling), or is simply flashing the CSC file?
Click to expand...
Click to collapse
If you don't care about Wifi Calling yeah I would say just root, custom kernel, and flash the CSC. You'll get VoLTE, HD voice, video calling etc
Kalm_Traveler said:
If you don't care about Wifi Calling yeah I would say just root, custom kernel, and flash the CSC. You'll get VoLTE, HD voice, video calling etc
Click to expand...
Click to collapse
Ahhhh, of course. I'd forgotten about the kernel. Suggestions?
Thank you for the assist.

[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F

* 2018 January 19 massive update*
After days and nights 3 months of trying to get this to work on my Korean N950N's base, I realized that it is either missing components or has different incompatible versions of some files compared to the N950F (noticing that both TEKHD's pack and the CSC changer mega zip specify being for the F international models) and flashed NEMESIS N950F-based ROM, then this on top of it. finally figured out what needed to be changed to get this working on the N variant.
Quick summary:
Near stock T-Mobile N950U TMB CSC (unencrypted so feel free to tweak the CSC features if you wish)
swapped bootup and shutdown videos to unbranded Note 8
by swapping bootup and shutdown videos, T-Jingle does not play on bootup or shutdown
enabled Smart Call caller ID
enabled FM radio menu but more research is needed to confirm if the Exynos 8895 has an FM radio chip or not
enabled message type visible in MMS/SMS apps
enabled hardware version in system menu
enabled editing of APNs
removes all Korean carrier apps from N950N variant (SK Telecom, kt Olleh, and LG U+ apps)
VoLTE and Wifi Calling work for both Exynos variants. On N950N firmware, an N950F-based kernel still needs to be used at the moment but this is being researched further - I would like the zip to stand on it's own.
There may be some other minor tweaks that I can't remember off-hand but this is by and large stock N950U's CSC features.
For N950N firmware: Everything works including wifi calling* as of version 9m1, N950F-based kernel is still needed for init.rilepdg.rc - will be researching to see if I can get this to load from /system/ instead so no kernel mod or separate kernel is necessary
For N950F firmware: Everything works, including wifi calling.
Download Link:Exynos Note 8 T-Mobile VoLTE + Wifi Calling patch version 9m1
*EDIT 2018-01-19*
Total overhaul from the original - version 9m1 uploaded which works on both N950F and N950N firmware, though at the moment on the N950N a custom kernel (N950F-based) still needs to be used to get T-Mobile Wifi Calling to connect.
*EDIT 2017-09-28*
Minor script tweak update (replaced link) because I noticed sometimes it was defaulting to XAA instead of TMB. Now it will definitely always default to TMB.
So to simplify I can use this on a N950F on Tmobile and still get all the functions like from a Tmobile variant?
Clarkkent434 said:
So to simplify I can use this on a N950F on Tmobile and still get all the functions like from a Tmobile variant?
Click to expand...
Click to collapse
Yes, you'll get wifi calling, VoLTE, HD Voice dialer, etc. I didn't include the T-Mobile bloatware apps but I think you can download them from the Google Play Store separately if desired.
Looks like you finally got it working. Cheers!
I didn't check your Q&A thread on it, but did you keep your native bootloader (N950N) or did you just go all N950F?
Thanks for figuring this out, working great for me. I couldn't stand the tmobile jingle on start up. Easy fix, just removed the related files before flashing.
My N950F didn't have the shutter sound toggle. I just got rid of the shutter audio file but after flashing this I now have the toggle.
Kamikaze_Ice said:
Looks like you finally got it working. Cheers!
I didn't check your Q&A thread on it, but did you keep your native bootloader (N950N) or did you just go all N950F?
Click to expand...
Click to collapse
Thanks! Yes kept my N950N bootloader and modem. Roughly around the same time I first flashed the 950F ROM though my LTE signal changed to terrible, and I haven't figured out yet what the cause is - even tried going back to full stock N950N with Odin and speeds/signal strength are abysmal. My old Note 5 is running circles around this thing LTE-wise.
shouren04 said:
Thanks for figuring this out, working great for me. I couldn't stand the tmobile jingle on start up. Easy fix, just removed the related files before flashing.
My N950F didn't have the shutter sound toggle. I just got rid of the shutter audio file but after flashing this I now have the toggle.
Click to expand...
Click to collapse
Glad it helped! Yeah I am not a big T-jingle fan either but it was a nice immediate sign that the zip worked. That toggle can be in either the others.xml or in framework-res.apk -> res-> bools.xml as I found out tonight.
Is this a T-Mo only thread.. any info for AT&T here or if not.. know where to go? Also have N950N - after Renovate Rom registers as 950F and looking to get it working super fast on at&t?
So if I stay on the stock N950N KT firmware, all I will be missing is WiFi Calling? Everything else works now? Wasn't sure from the way you worded it in the OP. Do I have to flash an N950F ROM to make things work? Should I just flash the stock N950F ROM if I just want things stock instead of a custom ROM?
Comp1demon said:
Is this a T-Mo only thread.. any info for AT&T here or if not.. know where to go? Also have N950N - after Renovate Rom registers as 950F and looking to get it working super fast on at&t?
Click to expand...
Click to collapse
My patch is for T-Mobile, but it includes the AT&T files as well. You could change a few tiny script things to make it set the CSC to ATT, though I have no way to test if it will work as well, plus I guess you have to call AT&T and have them enable VoLTE and wifi calling on their end for your IMEI.
FMXP said:
So if I stay on the stock N950N KT firmware, all I will be missing is WiFi Calling? Everything else works now? Wasn't sure from the way you worded it in the OP. Do I have to flash an N950F ROM to make things work? Should I just flash the stock N950F ROM if I just want things stock instead of a custom ROM?
Click to expand...
Click to collapse
Yes, on the stock firmware with this patch you will get all the goodies except for WiFi calling. I have not yet figured out what's missing between the 950N and 950F firmwares that allows the patch to make wifi calling work on the F only. If I can get some more time to figure it out I will make an updated patch and I'll probably switch back to 950N firmware because I'm having awful LTE suddenly and want to eliminate everything in the 950F ROM as a culprit.
FMXP said:
So if I stay on the stock N950N KT firmware, all I will be missing is WiFi Calling? Everything else works now? Wasn't sure from the way you worded it in the OP. Do I have to flash an N950F ROM to make things work? Should I just flash the stock N950F ROM if I just want things stock instead of a custom ROM?
Click to expand...
Click to collapse
Yes exactly, everything besides the wifi calling will work. If I can get some more time to figure out what's missing between the F and N firmwares I will update the patch to include the necessary files for our stock N firmware to get it working as well.
I'd rather stick to N firmware if possible to avoid any issues with F ROM incompatibilities but at the moment I'm trying to figure out why my LTE signal suddenly sucks. Odin'ed back to full stock and it still sucked so I am spending most of my free time troubleshooting that at the moment.
Kalm_Traveler said:
.... at the moment I'm trying to figure out why my LTE signal suddenly sucks. Odin'ed back to full stock and it still sucked so I am spending most of my free time troubleshooting that at the moment.
Click to expand...
Click to collapse
That sounds a bit reassuring for me. After I flashed this I got a 10mbps decrease in speed. I thought it was just the time of day or something but now I can't ever hit the speeds I had prior to flashing this so I was wondering. It's only 10 mbps but where my house is I don't get the greatest of speeds so any bit counts. I probably won't tell a difference anyway.
I haven't tried restoring to a nandroid yet, I'll keep testing. I don't think it was due to this mod but who knows.
shouren04 said:
That sounds a bit reassuring for me. After I flashed this I got a 10mbps decrease in speed. I thought it was just the time of day or something but now I can't ever hit the speeds I had prior to flashing this so I was wondering. It's only 10 mbps but where my house is I don't get the greatest of speeds so any bit counts. I probably won't tell a difference anyway.
I haven't tried restoring to a nandroid yet, I'll keep testing. I don't think it was due to this mod but who knows.
Click to expand...
Click to collapse
I ended up flashing a nandroid of my EFS partition from 11 days ago and that fixed it. I don't think this mod has anything to do with it because it only changes the CSC code in 3 files there, mps_code.dat , omcnw_code.dat and replace_code.dat all three of those files are just plain text of 3 letters each, on my SK Telecom N950N they were SKC, SKC, and SKO respectively. On my T-Mobile branded Note 5 they are all TMB, so that's what my script set them to.
Also, on this nandroid backup I already had flashed the CSC so I know that isn't the issue. Where I noticed a problem was roughly when I flashed a 950F-based ROM to test out a theory that F-based models came with some files that the N models lacked, which is why my tiny CSC pack enabled T-Mobile wifi calling on F ROMs but not N ROMs.
I am confident that the pack is fine but i am going to work on a new one from scratch specifically for making wifi calling work on the N models, and with a different CSC approach, this pack (and the TEKHD one it spawned from) basically wipe out any existing CSC files and settings, and replace them with it's own. I don't think changing those 3 files on the EFS partition is necessary, nor is having the CSC report that it's from a different model so I am going to build a new pack that simply adds CSC information to the existing data - this way the phone always knows which model it is, and that you are simply using a SIM card and selecting it's matching CSC rather than going with what it was defaulted to. This will work perfectly on the N950N since it was already built with a multi-CSC from the factory, the model info indicates that it is branded for SK Telecom, KT olleh, or LG U+ but none of them are locked, and they all contain the same multi-CSC for all 3 carriers.
Please standby for a few hours while I hammer out this new and improved pack.
Thanks. Another question, for those.of you that installed this, does your LTE indicator next to your reception bars say 4g/LTE or LTE+?
shouren04 said:
Thanks. Another question, for those.of you that installed this, does your LTE indicator next to your reception bars say 4g/LTE or LTE+?
Click to expand...
Click to collapse
the 4g/LTE icon is the T-Mobile icon, if the pack applied properly that is the one you'll get with Download Booster turned off. With it on, the icon should change to an upward-pointing Wifi symbol with LTE above it. The LTE+ icon is from the original CSC.
Kalm_Traveler said:
the 4g/LTE icon is the T-Mobile icon, if the pack applied properly that is the one you'll get with Download Booster turned off. With it on, the icon should change to an upward-pointing Wifi symbol with LTE above it. The LTE+ icon is from the original CSC.
Click to expand...
Click to collapse
Ok, some weird stuff just happened, got it all figured out now....
I have a N950F from Clove UK. The original icons were 4G & 4G+, never saw LTE or LTE+. After I flashed this mod it changed to 4G/LTE like what I'm used to seeing on my TMO N5.
The reason I asked cause I had just changed ro.config.tima from 1 to 0 to get SHealth working again because of root. After doing so I noticed the 4G/LTE indicator changed to LTE+. Also after that build.prop change, the preinstalled Microsoft apps reappeared. After root I wanted to uninstall them but they disappeared, didn't show as installed in Ti Backup either.
But what I didn't notice immediately is that everything I got from installing this mod had disappeared too like as if I never installed it with the exception of the LTE+ icon which I never had before.
Makes sense why the Microsoft apps started working again after the tima change but don't know why it would affect this mod. I simply reflashed this mod & everything's back to normal. Just throwing this out there if it happens to anyone else.
shouren04 said:
Ok, some weird stuff just happened, got it all figured out now....
I have a N950F from Clove UK. The original icons were 4G & 4G+, never saw LTE or LTE+. After I flashed this mod it changed to 4G/LTE like what I'm used to seeing on my TMO N5.
The reason I asked cause I had just changed ro.config.tima from 1 to 0 to get SHealth working again because of root. After doing so I noticed the 4G/LTE indicator changed to LTE+. Also after that build.prop change, the preinstalled Microsoft apps reappeared. After root I wanted to uninstall them but they disappeared, didn't show as installed in Ti Backup either.
But what I didn't notice immediately is that everything I got from installing this mod had disappeared too like as if I never installed it with the exception of the LTE+ icon which I never had before.
I simply reflashed this mod & everything's back to normal. Just tgrowing this out there if it happens to anyone else.
Click to expand...
Click to collapse
is that on the latest version from 9/28? On the first release I noticed that sometimes i had to flash it twice to get it to switch to T-Mobile because it was set to XAA default (I was just copying how the original was set up).
Kalm_Traveler said:
is that on the latest version from 9/28? On the first release I noticed that sometimes i had to flash it twice to get it to switch to T-Mobile because it was set to XAA default (I was just copying how the original was set up).
Click to expand...
Click to collapse
This is on N950FXXU1AQI1 build date 9/1 which I updated from OTA before root. It originally came with N950FXXU1AQH9.
I flashed only once & it worked perefectly fine until today after I changed the tima setting & rebooted. Well twice actually caused I flashed again removing the tmo boot jingle.
My CSC was originally XEU/XEU/XEU when it was on QH9. After the OTA update to QI1 it changed to XEF/XEF/XEU. SIM has always been tmobile since I received it. CSC after flashing this mod is TMB/TMB/XEU.
shouren04 said:
This is on N950FXXU1AQI1 build date 9/1 which I updated from OTA before root. It originally came with N950FXXU1AQH9.
I flashed only once & it worked perefectly fine until today after I changed the tima setting & rebooted. Well twice actually caused I flashed again removing the tmo boot jingle.
My CSC was originally XEU/XEU/XEU when it was on QH9. After the OTA update to QI1 it changed to XEF/XEF/XEU. SIM has always been tmobile since I received it. CSC after flashing this mod is TMB/TMB/XEU.
Click to expand...
Click to collapse
oh I mean when did you download my zip?
Anyhow I am working on a revised one just for adding T-Mobile's features (doesn't contain CSC info for other USA carriers). I noticed that the factory SK Telecom signal bars are deceiving compared to T-Mobile. With LTE Discovery running on my T-Mobile Note 5 right next to SK Telecom Note 8, the Note 5 is typically 7-12 dBm lower (like numerically lower, so on the same band the 5 is -84.0 dBm and the 8 is -97.0 dBm). If I run speed tests side by side the 8 gets a bit quicker downloads for a few minutes but then it suddenly drops. Just now after flashing my new test CSC file, the 5 was getting 50-90mbps down, and the 8 was getting 70-130mbps down, but suddenly the 8 started getting 2-5mbps max.
Kalm_Traveler said:
oh I mean when did you download my zip?
Anyhow I am working on a revised one just for adding T-Mobile's features (doesn't contain CSC info for other USA carriers). I noticed that the factory SK Telecom signal bars are deceiving compared to T-Mobile. With LTE Discovery running on my T-Mobile Note 5 right next to SK Telecom Note 8, the Note 5 is typically 7-12 dBm lower (like numerically lower, so on the same band the 5 is -84.0 dBm and the 8 is -97.0 dBm). If I run speed tests side by side the 8 gets a bit quicker downloads for a few minutes but then it suddenly drops. Just now after flashing my new test CSC file, the 5 was getting 50-90mbps down, and the 8 was getting 70-130mbps down, but suddenly the 8 started getting 2-5mbps max.
Click to expand...
Click to collapse
Oh, I didn't even know there was a revised version. Looks like I have the older one, pack v3a. Still never saw XAA though.
A revised version would be great, I wonder why the need for all the CSCs but I didn't feel like messing with anything. I'll keep an eye out. Thanks

Enable Volte and VOWIFI on unlocked note 8

Hi,
I've an Galaxy Note 8 (canadian, SM-N950W), buyed directly from samsung, so it's factory unlock and not in any carrier database.
My carrier offer Volte and Vowifi on S7, S7 Edge, and iPhone. I've an Volte capable sim card, and the volte component is activated in my account whit my carrier (i've an S7 edge in my carrier database).
Now, i want to get it to work whit my note 8. I've done many search on the web, and found nothing that work. I've try to get a shortcut for the ims settings, but it said "not found any csc feature", and the apps won't open.
After that, i've thinked about many other alternative, but i'm not sure if it will work, that the reason i'm asking before doing anything wrong and brick my phone. I know all the samsung carrier-specific function is on the CSC. I can just root and edit the config file, but i don't want to void my warranty, and get limited to 80% of charge.
So, another thing i'm thinking, is to flash the s7 edge CSC on my note 8, that already have the volte function enabled on it. Will it work, because it's not the same model?
I've tried too opening my firmware (downloaded from the web for my carrier), extract it, but when it's time to access the csc img.ext4 file, i get a "corrupted archive" from winrar, that let me doing anything.
Any ideas? Thank!
dardares said:
Hi,
I've an Galaxy Note 8 (canadian, SM-N950W), buyed directly from samsung, so it's factory unlock and not in any carrier database.
My carrier offer Volte and Vowifi on S7, S7 Edge, and iPhone. I've an Volte capable sim card, and the volte component is activated in my account whit my carrier (i've an S7 edge in my carrier database).
Now, i want to get it to work whit my note 8. I've done many search on the web, and found nothing that work. I've try to get a shortcut for the ims settings, but it said "not found any csc feature", and the apps won't open.
After that, i've thinked about many other alternative, but i'm not sure if it will work, that the reason i'm asking before doing anything wrong and brick my phone. I know all the samsung carrier-specific function is on the CSC. I can just root and edit the config file, but i don't want to void my warranty, and get limited to 80% of charge.
So, another thing i'm thinking, is to flash the s7 edge CSC on my note 8, that already have the volte function enabled on it. Will it work, because it's not the same model?
I've tried too opening my firmware (downloaded from the web for my carrier), extract it, but when it's time to access the csc img.ext4 file, i get a "corrupted archive" from winrar, that let me doing anything.
Any ideas? Thank!
Click to expand...
Click to collapse
My logic says, surely the easiest way would be to
flash your carriers Note 8 stock Rom with Odin
If this is possible. This way you most likely to keep
everything official. (Knox etc)
I was in a similar situation.
In my case i had a branded Note 8 and
unintentionally flashed unbranded Samsung firmware.
I did not also have volte and wifi calling etc.
No shortcuts work
So i flash my correct branded carrier firmware
All was working again.
I have no carrier branded bloat, as i uninstalled
them.
This for me was the easiest option
Good luck.
Thank for replying willcor
In your case, can you access the ims settings shortcut? And then, enable Volte and get it to work?
Are you rooted? And does the note 8 is officialy supported by your carrier?
FInaly, can i just flash the csc whit odin so i will keep my file, or i need to flash the complete rom, and loosing my data?
Thank!
dardares said:
Thank for replying willcor
In your case, can you access the ims settings shortcut? And then, enable Volte and get it to work?
Are you rooted? And does the note 8 is officialy supported by your carrier?
FInaly, can i just flash the csc whit odin so i will keep my file, or i need to flash the complete rom, and loosing my data?
Thank!
Click to expand...
Click to collapse
Firstly, i am not rooted. Stock branded carrier firmware.
As i already had my sim enabled for volte, wifi calling
etc with carrier i re flashed the carrier firmware
Volte appeared "automatic" after flashing. (Short while later ) For me the easiest way.
It was unintentionally that i had flash unbranded
Samsung firmware.
I was originally on branded firmware.
(Vodacom /Vodafone.)
I soft bricked my device while
beta testing.
When i was on this unbranded Samsung firmware
i noticed that there was no volte, wifi calling
and no stock Hiya spam software. etc.
I used QuickShortcutMaker to try and enable
shortcut to wifi calling. No luck.
I'm only suggesting you check this option out
... if possible, then surely it the best way to go.?
Further just flashing to change CSC gave me all sorts of
issues.
I landed up having XEF (France) and my device showing 32 gig storage.! Instead of 64 gig.
then flashing again i landed up on XFE (SAMSUNG)
Sorted storage out to 64 gig.
Then again i Flashed carrier firmware
4 x files ( did not flash home CSC but the other CSC
which resetted device and all is well and knox 0 x0
Bottom line is that
all my previous devices are rooted. So i knew what i was doing.
When i soft bricked my device etc.
so i did not panic.
So i suggest make sure or
look for a relevant video etc on YouTube
if not sure
Yes you are going to lose your data. So do a backup.
Flashing the "home CSC" basically is a dirty
flash.. You don't loose anything.
Which i think is not going to help you.?
Good luck.
Hi,
I've flashed the firmware of an operator that support the note 8, but still not any settings for it in the phone app setting. Can't still access ims setting too.
dardares said:
Hi,
I've flashed the firmware of an operator that support the note 8, but still not any settings for it in the phone app setting. Can't still access ims setting too.
Click to expand...
Click to collapse
for me the ,the best option /scenario would be .....
1) Your service provider that you enabled volte ,wifi calling etc with .
2) Further your sim requirements ,for me i had to have sim 64 or higher ( with correct CSC of carrier .)
3) Then obviously that same service provider ( above ) stock Note 8 firmware ,if compatible with your Note 8 model /device etc .
According to what i experience surely , above should be enough to get it enabled .?
Plse note.....
i would not use another carrier firmware etc ,
(as in this case) just because it should have similar firmware .
Try to align your options ,to make it easier .!
This for me should be an key option ,not another provider that has similar functions etc .
Remember you got no root ,would prefer to keep knox 0 x 0 etc .
so your options are limited .?
good luck
Hi,
Still not getting it to work. But today, i've noticed LTE+ icon appear intermittent. It's switch to 3G when i place call.
No any settings of VOLTE.
Can't find any solution to root my phone (snapdragon), because i've the new update. I'm pretty sure it's a way to get it to work, but don't know how. It's just software issues because my operator was activated it in my account.
Hi,
Finaly, after 3 !!! factory reset, gessing whit 3 different carrier, i've activated it, i've it in the settings.
Now, when i make a call, it switch to 4G. I think it's the APN. I know my carrier need 3 apn for the VOLTE, and still have only one. I will try to find the 3 apn setting today.
For the vowifi, i see it in the notification center, a toggle to activate it, but it's do nothing.
I've successfully found the ims, there are 4 for my operator. But i can't find the IMS APN type in the option given in the phone.... How i can enable it?
dardares said:
I've successfully found the ims, there are 4 for my operator. But i can't find the IMS APN type in the option given in the phone.... How i can enable it?
Click to expand...
Click to collapse
If you want it to be easier call your carrier and have them add the imei # to their database then the imei will be whitelist and reprovisioned...then you can just use the unlocked firmware or the full carrier Firmware...
BlueFox721 said:
If you want it to be easier call your carrier and have them add the imei # to their database then the imei will be whitelist and reprovisioned...then you can just use the unlocked firmware or the full carrier Firmware...
Click to expand...
Click to collapse
Try this video. I literally JUST did this after WEEKS of looking for an answer.
watch?v=gjFs4ksDdtg
P.S. Won't let me enter a link so this is the video on "you tube".
gknight1971 said:
Try this video. I literally JUST did this after WEEKS of looking for an answer.
watch?v=gjFs4ksDdtg
P.S. Won't let me enter a link so this is the video on "you tube".
Click to expand...
Click to collapse
I have posted many times with the same info...Several others have as well..
Thanks for sharing though...just search IMS BlueFox721 in XDA search and you will get more info than the video explains as there are other settings to do as well..
Thanks again for sharing
that video and related info is only to add the missing features if you are not on the right csc.
but it wont fix the issue where the carrier is only allowing imei from phones they sell to use these enhanced voice features. In the case of Rogers and others, you can try calling them all you want but in the end they wont do squat to white list your imei. maybe some other providers will yeild to your requests but Rogers is know to not white list non carrier phones.
I successfully got HD Voice turned on and working. But no sign of Wi-Fi calling. I was searching through shortcutmaster and came across a menu where I can turn on wifi calling. It isnt grayed out, however it wont actually toggle over. The screenshot posted is from tapping the menu dots in the top right part of the screen. I assume I need these filled in to enable it. Any ideas on how to populate the right info. Im on verizon, but got the Note 8 from Samsung, carrier unlocked. SM-N950U1
hb
wdcspurs said:
I successfully got HD Voice turned on and working. But no sign of Wi-Fi calling. I was searching through shortcutmaster and came across a menu where I can turn on wifi calling. It isnt grayed out, however it wont actually toggle over. The screenshot posted is from tapping the menu dots in the top right part of the screen. I assume I need these filled in to enable it. Any ideas on how to populate the right info. Im on verizon, but got the Note 8 from Samsung, carrier unlocked. SM-N950U1
Click to expand...
Click to collapse
How you turn on Volt?

Samsung Galaxy S10 - Unlocked Phone (AT&T Blocked Call Issue)

So many people are reporting with the 3/1 sweep by AT&T, that they are blocking almost all Unlocked phones: See: Downdector Link We personally have a S10 (G973U1). AT&T is saying on this list: AT&T approved phone list that it is supposed to work. But like many other people "calls" end immediately, but we can text and data work. It is some sorta ploy by AT&T to force us to upgrade our phones. They want us all to upgrade to S22s. Anyway I was ranting. Anyway, if you look at that link, they are saying that the phone has to be on the latest software. The last update from AT&T or the manufacturer was in January. I checked the firmware site, and Android 11 is the latest in January. I'm wondering if there is some hack to get us on to '12' or something. An update might solve this issue. We know that a new SIM does not work. Calls seem to be rejected on the network, just based on the phone model or Android version.
We are aware that a version 12 is out there for the phone, just that firmware is not for our US-unlocked model yet. But maybe it can be hacked?
Edit: It appears this thread may be linked with this older one... But it is ever more pressing issue now:
S10 Unlocked phone with AT&T Firmware here they explain how, and the problems with flashing. This was back in 2019, so I'm not sure if this will still work. Even then it didn't work for everyone. Some in that forum claimed that it did. AT&T seems to now be blocking from their calling network any phones not enabled with VOLTE and the extended AT&T services that are not present in Unlocked phones.
robertkjr3d said:
So many people are reporting with the 3/1 sweep by AT&T, that they are blocking almost all Unlocked phones: See: Downdector Link We personally have a S10 (G973U1). AT&T is saying on this list: AT&T approved phone list that it is supposed to work. But like many other people "calls" end immediately, but we can text and data work. It is some sorta ploy by AT&T to force us to upgrade our phones. They want us all to upgrade to S22s. Anyway I was ranting. Anyway, if you look at that link, they are saying that the phone has to be on the latest software. The last update from AT&T or the manufacturer was in January. I checked the firmware site, and Android 11 is the latest in January. I'm wondering if there is some hack to get us on to '12' or something. An update might solve this issue. We know that a new SIM does not work. Calls seem to be rejected on the network, just based on the phone model or Android version.
We are aware that a version 12 is out there for the phone, just that firmware is not for our US-unlocked model yet. But maybe it can be hacked?
Edit: It appears this thread may be linked with this older one... But it is ever more pressing issue now:
S10 Unlocked phone with AT&T Firmware here they explain how, and the problems with flashing. This was back in 2019, so I'm not sure if this will still work. Even then it didn't work for everyone. Some in that forum claimed that it did. AT&T seems to now be blocking from their calling network any phones not enabled with VOLTE and the extended AT&T services that are not present in Unlocked phones.
Click to expand...
Click to collapse
I was helped by a user to achieve ascendance onto the AT&T network. I'm not sure if I'm to reveal his name. We 1) go into Developers mode on the phone. 2) Hack the Kernel. 3) Flash the rom to the G973U (model)... with the AT&T firmware. So that the Wifi-Calling and 5G features would work, and AT&T would allow it on their network.
robertkjr3d said:
I was helped by a user to achieve ascendance onto the AT&T network. I'm not sure if I'm to reveal his name. We 1) go into Developers mode on the phone. 2) Hack the Kernel. 3) Flash the rom to the G973U (model)... with the AT&T firmware. So that the Wifi-Calling and 5G features would work, and AT&T would allow it on their network.
Click to expand...
Click to collapse
I've literally been searching for an answer to this for days now. My wife and I have S10's. I work far from home so I really need her phone working in case of emergency. Can you please point me in the general direction? Thanks!
Agreed, I didn't know such a thing was possible, but I'd love to hear more about this!
skrapmetal said:
I've literally been searching for an answer to this for days now. My wife and I have S10's. I work far from home so I really need her phone working in case of emergency. Can you please point me in the general direction? Thanks!
Click to expand...
Click to collapse
At first I had to use the Samsung Band Selector app from the Play store and go into More Network Settings > AT&T > Preferred Network Type and choose 3G. Unfortunately this killed LTE so all data and calls were going through H+. As I was mostly on wifi I could live with it since I could actually use the phone again.
Then Friday morning I checked for updates and there was the update to take me to Android 12. I took the update then when it finished it said it needed to reboot to connect new SIM to carrier services....it wasn't a new SIM. I let it reboot and everything was working with VoLTE again.
Hope this helps.
KennyG123 said:
At first I had to use the Samsung Band Selector app from the Play store and go into More Network Settings > AT&T > Preferred Network Type and choose 3G. Unfortunately this killed LTE so all data and calls were going through H+. As I was mostly on wifi I could live with it since I could actually use the phone again.
Then Friday morning I checked for updates and there was the update to take me to Android 12. I took the update then when it finished it said it needed to reboot to connect new SIM to carrier services....it wasn't a new SIM. I let it reboot and everything was working with VoLTE again.
Hope this helps.
Click to expand...
Click to collapse
I appreciate you getting back to me. Unfortunately I am still on android 11 with a custom ROM and also this is a global phone so that app didnt work for me. I dont receive OTA updatez. I'll update to a new ROM and see what happens. Thanks

SM-G973U VoLTE

I recently bought an unlocked Galaxy S10 SM-G973U on Amazon. Got new SIM card from a Verizon MVNO and activated phone. The phone downloaded Android 12, One UI version 4.0. Firmware Build number SP1A210812.016.G973USQS6HVA1. Service provide Software version SAOMC_SM-G973U_OYN_SPR_12_0007 SPR/XAA/VZW. The problem is there is no menu option to activate/switch on VoLTE which means when I'm on a call there is no internet. I've talked to the MVNO tech support multiple times and was told they couldn't see any problems on their side, or that the SM-G973U does not support VoLTE which is not true. I found on one of AT&T's sites that the SM-G973U needs a software patch to enable VoLTE. I also found a couple of USSD codes but they either didn't work or didn't get me to the right setup screen to turn on VoLTE. I even stopped by a Samsung store and they weren't any help either. They said they could re-flash a stock firmware but it would revert to being locked to a carrier which is apparently also not true based on what I've read on this forum. Anyone know how I can turn on VoLTE or know of an apk file or software patch to enable VoLTE?? Does one of the firmware versions posted online have the patch to turn on VoLTE??
I think the issue is that your phone is showing SPR/XAA/VZW. You say you're on a verizon MVNO (who, by the way?)... but your phone isn't seeing that. It's actually saying it's active for SPRint. The second one, XAA, means it's not able to detect the SIM type... and the third was that it was originally VZW, which you can't change and isn't really relevant. (That's just what the phone was "born" as).
Bottom line, your phone isn't seeing VZW or an MVNO as the active CSC nor the SIM card. In the past, the easy thing was to change the CSC to what you need, but I haven't found a way to do that actively. What's supposed to happen is that the CSC should update based on the SIM card and cell signal you're getting... but this doesn't always happen. I bought two phones - one switched with no issues, the other I could not get it to change no matter what I tried.
That said, the easiest thing is to clean flash the phone with ODIN to a VZW or your MVNO's ROM, so that (hopefully) the CSC updates automatically. You could also consider flashing a U1 (unlocked) ROM, as yours is not technically an unlocked ROM (U means it's a carrier ROM... which may be why it's not switching over?)
Again, I tried all of these on the second phone I bought, and nothing would switch it (my carrier is Total Wireless, which is a VZ MVNO, and actually shows up as Tracfone (TFN). I had to return that second phone and get another with TFN already activated, and that worked fine... so be sure you do this before you drop out of your return period.
Bottom line, you should be able to get this all working... my VOLTE/VOWIFI works fine... just a matter of getting you there.
Thanks. My carrier is Straight Talk which is now VZ. The SIM card they sent me has the wording "Verizon Compatible" written on it. I finally found a document that explains how to interpret the CSC codes and your explanation clarifies my understanding of it. Sound like I'll have to re-flash it. Since it was originally a VZW phone I'm thinking I should flash it back to VZW to see if that works before trying U1.
Dumb question as this is my first time flashing a phone. (I've flashed quite a few other things but never had to worry about CSC codes and bootloader versions, etc.) I don't see VZW firmware on samfirms or sammobile. I see Sprint, T-Mobile, and one listed as USA without carrier info but I don't see one for VZW. Can someone point me to the correct location to download SM-g973U and U1 firmware for VZW? Greatly appreciated and thanks for putting up with my lack of knowledge!
Edited: Found the files on sammobile. Will try the U1 (VZW) first. I'll keep my fingers crossed.
schwinn8 said:
I think the issue is that your phone is showing SPR/XAA/VZW. You say you're on a verizon MVNO (who, by the way?)... but your phone isn't seeing that. It's actually saying it's active for SPRint. The second one, XAA, means it's not able to detect the SIM type... and the third was that it was originally VZW, which you can't change and isn't really relevant. (That's just what the phone was "born" as).
Bottom line, your phone isn't seeing VZW or an MVNO as the active CSC nor the SIM card. In the past, the easy thing was to change the CSC to what you need, but I haven't found a way to do that actively. What's supposed to happen is that the CSC should update based on the SIM card and cell signal you're getting... but this doesn't always happen. I bought two phones - one switched with no issues, the other I could not get it to change no matter what I tried.
That said, the easiest thing is to clean flash the phone with ODIN to a VZW or your MVNO's ROM, so that (hopefully) the CSC updates automatically. You could also consider flashing a U1 (unlocked) ROM, as yours is not technically an unlocked ROM (U means it's a carrier ROM... which may be why it's not switching over?)
Again, I tried all of these on the second phone I bought, and nothing would switch it (my carrier is Total Wireless, which is a VZ MVNO, and actually shows up as Tracfone (TFN). I had to return that second phone and get another with TFN already activated, and that worked fine... so be sure you do this before you drop out of your return period.
Bottom line, you should be able to get this all working... my VOLTE/VOWIFI works fine... just a matter of getting you there.
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Success! Was able to flash U1. VoLTE is now working. The CSC now shows TFN/TFN/VZW. Much appreciated!!!
Awesome, glad to hear that fixed it easily!
And TFN... I'm a fan there, too!
Hi! I'm having a similar issue with the same model and happy to see someone was able to enable VoLTE. However, most of what you said above is a foreign language to me. Would one of you be willing to give me a crash course in what you did?
Here's my specific situation. Last week (~1/4/23) Tracfone shutdown 3G. My Samsung Galaxy S10 (SM-G973U) says my network is set to LTE/3G/2G. I've read LTE is 4G, but still can't make or receive calls/texts, but data and 911 calls still work. Their tech support is no help.
From reading online it sounds like I may need VoLTE, not just LTE. Hence finding this thread. If one of you would be willing to spare some time to walk me through what you did I'd really appreciate it. In the mean time I'll try to figure out what "flashing" mean in a context that doesn't involve showing body parts
Thank you in advance!!
I'm on Tracfone (they were bought out by Verizon, BTW) - I was on Total Wireless before, which is now Total by Verizon. You might try contacting support again, as they are now VZ, and may have more help to offer.
My S10+ is running 975U1 now, and it works for VOLTE/VOWIFI properly. You may consider getting a U1 ROM installed, and maybe even the VZW (or TFN) version if available - that may get you working.
Did VOLTE ever work for you before on this or any other carrier? What is your CSC right now?
schwinn8 said:
I'm on Tracfone (they were bought out by Verizon, BTW) - I was on Total Wireless before, which is now Total by Verizon. You might try contacting support again, as they are now VZ, and may have more help to offer.
My S10+ is running 975U1 now, and it works for VOLTE/VOWIFI properly. You may consider getting a U1 ROM installed, and maybe even the VZW (or TFN) version if available - that may get you working.
Did VOLTE ever work for you before on this or any other carrier? What is your CSC right now?
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Thanks for replying! I'm not entirely sure if VoLTE has worked previously. I bought this phone 6/2021 and have only haver had tracfone service for it. I did find in my setting that VoLTE calling is set to on so it seems like it should work. Of note, the 4Glte in my status bar has always been grayed out (I went back and looked at some old screenshots).
My current CSC is VZW/XAA/ATT.
I spoke with tracfone customer service yesterday and they had me reset my network setting and now I don't even have data and the 4Glte in my status bar that was previously gray has now completely disappeared.
Their customer service refuses to talk to me now (literally no one answers when it transfers to an agent) or they hang up on me, and no I haven't been rude, but I have told them I'm recording the call.
I bought a mint mobile package last night because I'm beyond frustrated with Tracfone. I'm worried I'll have the same problems with Mint. I'm not sure if my settings are screwed up or if it's just Tracfone. In any case things are worse now after talking to customer service yesterday.
I also notice there was no APN setting on my phone so I updated it today and restarted but no difference.
Thanks for any input!! Much appreciated. Sorry for the novel.
Ok, so based on your CSC, the phone is not seeing the SIM's carrier - it's showing XAA which means it's using the default settings, which is probably why your not getting VOLTE. The active CSC of "VZW" may be ok... depends on which carrier you're on with Tracfone. I think they're VZW only, but I'm not completely sure.
You may want to just get a new SIM card and get that activated. HOWEVER, the problem you'll likely face is that the phone was born ATT (last CSC). This means the IMEI won't match a "compatible" phone to Verizon, and they will flat out refuse to activate it (even though WE al know it will work fine). If you still want to do that, you will have to activate the new SIM on a VZ "compatible" phone, then you can swap it to the S10. Note that VZ complains about this when you talk to them... so don't tell them you're doing this... but I've done it many times and it works fine.
If your actual behind-the-scenes carrier is ATT, then you can do the activation with your phone without issue.
If none of this works for you, you can switch carriers to an ATT MVNO and you should be good to go.
schwinn8 said:
Ok, so based on your CSC, the phone is not seeing the SIM's carrier - it's showing XAA which means it's using the default settings, which is probably why your not getting VOLTE. The active CSC of "VZW" may be ok... depends on which carrier you're on with Tracfone. I think they're VZW only, but I'm not completely sure.
You may want to just get a new SIM card and get that activated. HOWEVER, the problem you'll likely face is that the phone was born ATT (last CSC). This means the IMEI won't match a "compatible" phone to Verizon, and they will flat out refuse to activate it (even though WE al know it will work fine). If you still want to do that, you will have to activate the new SIM on a VZ "compatible" phone, then you can swap it to the S10. Note that VZ complains about this when you talk to them... so don't tell them you're doing this... but I've done it many times and it works fine.
If your actual behind-the-scenes carrier is ATT, then you can do the activation with your phone without issue.
If none of this works for you, you can switch carriers to an ATT MVNO and you should be good to go.
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OK some of that was still over my head. I'll see what happens with the Mint Sim... one f/u question now though. You said the ATT means my phone was "born" ATT. I bought my phone off backmarket and it was sold as "unlocked". Was that not true? How can I be sure in the future if I buy a used phone that's not from my carrier that it will actually be compatible?
Unlocked just means it's not locked to a carrier. That is true in your case, otherwise you wouldn't have been able to install ANY non-ATT SIM. So, you did the right thing to get an unlocked phone, and that is what you got.
The issue with compatibility is just the asshole carriers spreading lies. They do this to try to get people to buy THEIR phones, for no reason other than to make money and confuse consumers. The "born" CSC has no bearing on anything, really... neither does the carrier-specified IMEI. In your case, the XAA is good, which means it's a multi-carrier ROM, which works with all USA carriers.
Mint is a good idea - being an ATT carrier (IIRC), that should work and they should help you get it up and running even if they have to activate it. Good luck!
Awesome! Fingers crossed!! Thank you for your time and all the info❣
I'll try to remember to give an update in a few weeks for future readers
Goldie8709 said:
Awesome! Fingers crossed!! Thank you for your time and all the info❣
I'll try to remember to give an update in a few weeks for future readers
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Click to collapse
UPDATE: Switching to Mint worked like a charm! Once my number ported and I put the new SIM card in, service was instantaneous! I've had Mint for 3 weeks now and the service is so much better than with Tracfone! My calls go through nearly as soon as I hit call, the internet is faster.
I didn't need to do a thing either. No making APN settings, etc. I'm betting it has to do with what you said about my phone being born ATT. So funny because the software(?) is Verizon - shows the Verizon when I restart/power up. I still love my bastard phone
So thankful I didn't buy a different phone!!! Again thanks for all your help @schwinn8
Thanks for reporting back and letting us all know, and I'm glad it worked out well!
Yeah, the carriers pull this nonsense all the time... it's BS. The phones are all the same, only the ROM changes. If we can change ROMs (which we can) then there should be no reason to force users to specific IMEIs. But we know why they do this - follow the money. I encourage people to write to the FTC and FCC about this (I have).

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