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Can't change Australian Note 8 CSC - Stuck on Telstra

Hi Guys,
I purchased a Note 8 (950F) through Gumtree and although I knew it had the Telstra firmware,
I figured I'll just flash the regular Australian XSA unbranded firmware via Odin
and get rid of the Telstra branding as I have done in the past with other Samsungs.
Currently I use an Optus sim (which works) but have lost VoLTE and WiFi calling.
I have tried searching through these forums for a solution but can't get a clear answer.
When I flash the unbranded XSA firmware (BL, AP, CP and CSC, NOT Home_CSC)
I still get the Telstra branding and the software info remains on TEL/TEL/TEL.
Is this normal now? Are we forced to buy a phone from a network carrier if we want to use their services?
Or is there a way to make the switch but I am just overlooking something.
I don't want to root the phone or install anything custom as this will break some banking apps that I'm using.
Please help...

Currently I'm on XEF/XEF/VAU because just upgraded to Oreo, the original CSC is VAU/VAU/VAU
0. Backup your data
1. Download New Zealand or other country firmware.
2. Take both SIM and SD card out.
3. Flash the firmware of other country using CSC, not home_csc
4. Then check your CSC, should be changed.
I did't test the following steps, but I will try this weekend.
5. Flash back to Australia firmware.
6. Check the CSC number, should be changed to XSA
7. Insert SIM card.

hinnn said:
Currently I'm on XEF/XEF/VAU because just upgraded to Oreo, the original CSC is VAU/VAU/VAU
0. Backup your data
1. Download New Zealand or other country firmware.
2. Take both SIM and SD card out.
3. Flash the firmware of other country using CSC, not home_csc
4. Then check your CSC, should be changed.
I did't test the following steps, but I will try this weekend.
5. Flash back to Australia firmware.
6. Check the CSC number, should be changed to XSA
7. Insert SIM card.
Click to expand...
Click to collapse
Thanks for your input, I was considering this as I want Oreo as well but not game enough to try and mix other countries CSC's yet.
I read somewhere that Oreo will be widely available for most countries as of 1st of April, so I might wait till then and try again.

This does NOT necessarily mean Oz...
Remember, we are at the end of the list to get it as our stupid legal system upheld some patents on icons that Apple took out...
Also, if you're with any of the Telco's, add at least 6 months to that date...

Did you ever manage to get this sorted out? I'm in a similar boat to you, I have an Optus device but a Telstra Sim, when using the Telstra sim, I have no option for VoLTE, but when I use my Optus sim I do. Would like to get VoLTE and other features working on my Telstra sim.

don't understand

Hi can someone please help
I have unlocked Note 9 in the United Kingdom on three network ( purchased the handset and have a SIM only network deal ).. When will I get an OTA software update ? ... On SAMMOBILE I keep seeing new firmware builds for Note 9 and then the network name including ones for three... Is it Samsung or three that push the OTA software builds to my device ?

What CSC and what build do you have?
You can always grab latest available firmware ( OXM multi CSC ) and flash it manually through Odin. This won't trigger Knox or avoid warranty. Do make sure you know what you're doing and that you download the right firmware.

SM-G977B - Flash to BTU not working but ODIN Passes

Hey all
Strange one here, i have a SM-G977B (S10 5G on EE UK), i have unlocked it and trying to flash BTU firmware on it via ODIN (download fw from sammobile)
It flashes ok and passes but when phone starts up its CSC is TEL! (Australia!!)
I have re done the flash with XEU and still the same. firmware version says TEL/TEL/EVR in settings
any ideas on this? can this model be flashed to a different region? i want it on BTU not EVR (EE UK)
tried few versions of ODIn too, and left all check boxes default
Thanks

ok, i have reflashed the latest EVR firmware back to the phone and it has taken this fine
Wonder why it doesnt like BTU or XEU?

What firmware files were you trying to flash specifically?
Sounds like you downloaded the wrong one. What are the names of the firmware files you flashed?

the_scotsman said:
What firmware files were you trying to flash specifically?
Sounds like you downloaded the wrong one. What are the names of the firmware files you flashed?
Click to expand...
Click to collapse
Hi
Tried these
https://www.sammobile.com/samsung/firmware/SM-G977B/BTU/download/G977BXXS2ASJ7/299842/
https://www.sammobile.com/samsung/firmware/SM-G977B/XEU/download/G977BXXS2ASJ7/299840/
The above all flash on in Odin, but when the phone starts (even with uk sim in the phone) it defaults to Australia language and 2x Telstra apps install automatically, software info says tel/tel/evr
I then tried this one:
https://www.sammobile.com/samsung/firmware/SM-G977B/VOD/download/G977BXXU2ASJ5/299590/
And the above install the 2x Vodafone uk apps automatically which is fine as I am on Vodafone uk but in software Info is still says vod/vod/evr
What my issue is now is I don’t seem to get 5g on this phone even though I’m on a a 5g contract and has worked previously on a note10+ 5g handset.
Is this handset 5g modem locked to ee?

bigup7 said:
Hey all
Strange one here, i have a SM-G977B (S10 5G on EE UK), i have unlocked it and trying to flash BTU firmware on it via ODIN (download fw from sammobile)
It flashes ok and passes but when phone starts up its CSC is TEL! (Australia!!)
Click to expand...
Click to collapse
Did you enable OEM unlock in developer options before flashing?
I am waiting for delivery of an EE branded S10 5G tomorrow and planned to flash BTU firmware

dezborders said:
Did you enable OEM unlock in developer options before flashing?
I am waiting for delivery of an EE branded S10 5G tomorrow and planned to flash BTU firmware
Click to expand...
Click to collapse
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please

bigup7 said:
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please
Click to expand...
Click to collapse
OK, well I have always had to do that to change CSC via FW flash since the S9 range was released in 2018.
I am waiting for postman to deliver my S10 5G today so will try to flash BTU with OEM Unlock enabled, and let you know the outcome.
(If it doesn't work for me, i will do same as you and flash a network specific FW via Odin - H3G is my network provider).

bigup7 said:
Didn't think I needed to.
Gave up and went back to evr firmware.
Lmk how you get on please
Click to expand...
Click to collapse
Didn't work ended up with TEL CSC code so just flashed latest H3G

dezborders said:
Didn't work ended up with TEL CSC code so just flashed latest H3G
Click to expand...
Click to collapse
If you go to software information in settings, does it say h3g/h3g/evr?

bigup7 said:
If you go to software information in settings, does it say h3g/h3g/evr?
Click to expand...
Click to collapse
Yes exactly. My product code is also SM-G977BZAAEVR, so its always going to be an EE UK handset

Hello,
I have the same phone (SM-G977B), I exchanged it with someone in Shanghai (without a box, stupid me)
It was rooted with some CHC firmware (which did not let me download any Google play services), I tried to root the phone (my first time) and ended up re-locking the bootloader.
Later on, while trying different things, I ended up deleting the firmware from TWRP (as I formatted the data, cache folders/directories) as it was not booting up (bootloop on Samsung logo).
Long story short (and rather sad and stupid):
I have a brick phone which has no SD card slot, No OS installed, I do not know the original CSC (except that it was bought in some country in Europe), other firmwares does not flash with Odin (gives me Repartition error failed error), I am unable to mount the device (thought I could transfer the firmware using MTP), I can not change TWRP (downgrade or upgrade) as disk won't mount (for some reasons). I have formatted the disk, changes its format to ext4, ext2 etc.
Any ideas?

G991U and G991U1 Firmware Links and Flashing Discussion Here

For those who aren't already aware, G991U is the model number of all of the US carrier versions of the S21. The G991U1 is the model number of the same device, but sold by Samsung SIM unlocked and with no carrier bloatware. Firmware is 100% interchangeable among these models: any U or U1 firmware version can be flashed to any U or U1 device at any time, assuming that you're not trying to downgrade the bootloader. A "U to U" or "U1 to U1" flash does not require a factory reset, but changing from one firmware to the other will require one. Also, U firmware is identical for the 4 base files (AP, BL, CP, CSC) for each individual build, no matter which carrier it comes from. So if you download 2 different carrier versions of the exact same build, the 4 base files will be identical. Where the firmware differs is in the USERDATA file - that's where the carrier bloatware and customizations reside.
Manual Odin flashing is designed for those who:
- want to manually update to a newer version of U firmware on their U device, either because they don't want to wait for their carrier's OTA or because OTAs aren't working on their device, or a different carrier got a new feature/patch before they did
- want to flash U1 firmware to their U device
- want to convert from U1 firmware to carrier U firmware
- want to convert from one carrier's U firmware (with all apps and bloatware) to a different carrier's U firmware (with all apps and bloatware)
For those who aren't already aware, anyone can now download firmware for almost any Samsung device any time that they want, via the various firmware download tools posted here on XDA like SamFirm or Frija. There are threads and info about them here on XDA so I won't waste time explaining - do a search if you're not already familiar with these tools. But they only provide whatever the latest/newest/current version is - nothing older. I pay for a subscription to a site that gets the official releases (usually) before they hit the firmware download tools, so that's where my files come from.
This is not a "beginner's guide to Odin flashing" -type post/thread, so I won't list basic, step-by-step flashing instructions. My threads are geared towards those who already know what they're doing. If you're new to manually flashing Samsung firmware (or haven't done it in a long time), I recommend you consult one of those "beginner's" guides- there are tons of them here on XDA.
Happy flashing!
U firmware: https://www.androidfilehost.com/?w=files&flid=322084
U1 firmware: https://www.androidfilehost.com/?w=files&flid=322085
Notes:
- DON'T QUOTE THE OP WHEN YOU REPLY, kthx
- I have lots of threads just like this one for other Samsung flagships, if it interests you. For those who have already made use of my previous threads for a different device and are upgrading to an S21, welcome back
- My zips are compressed extra small for space and bandwidth savings. The default Windows extractor can't handle it, so you'll need a 3rd party tool like 7zip, WinRAR, etc
- it's quite time consuming to download the files, zip them up, and upload them to AFH. And, I do threads like this for every single Sx and Note x model - so I won't be uploading every single version. The only full builds that I upload are ones where I get access to a new bootloader and/or Android version early, before they hit the firmware download tools.
- My naming method for folders on AFH is: build - bootloader - Android version
So "SAT - 1 - 9.0" means the full build number ends in SAT, it's bootloader version 1, and it's Android 9.0. When bootloader and Android versions increment, the first build to have those changes will have its folder notated appropriately.
- HOME CSC file keeps data intact; using the other CSC will wipe data. Flashing USERDATA will also wipe data.
- Since AT&T doesn't allow their firmware to be publicly available (for any of their devices), I'll try to always upload at least one USERDATA per bootloader increment for AT&T (and Cricket, if they get this model). I'll also upload any full builds if AT&T is the only carrier to get that specific build, because you won't be able to find the files anywhere else.
- For identifying USERDATAS, and to know what region/CSC to use in the firmware download tools if you're downloading yourself:
AIO = Cricket (not available via firmware download tools)
ATT = AT&T (not available via firmware download tools)
BST = Boost Mobile
CCT = Xfinity Mobile (Comcast)
CHA = Spectrum Mobile (Charter)
SPR = Sprint
TMB = T-Mobile
TMK = Metro PCS
USC = US Cellular
VZW = Verizon (available via firmware download tools, but Manual Entry is required - Auto will not work)
XAA = U1 firmware
- the correct procedure for switching from one carrier's firmware to another is:
1. Flash full U1 firmware package including non HOME CSC
2. Upon boot, insert a SIM of the carrier whose firmware you want
3. Watch for the popup that says "reboot to apply new carrier settings" etc, and do it
4. After that restart completes, reboot back to Download mode and flash the full U firmware package, with the USERDATA file of the carrier whose firmware you want

Initial U firmware and AT&T USERDATA are posted, along with U1 firmware. U firmware is not yet accessible in the firmware download tools like SamFirm and Frija, but if anyone wants a different carrier's USERDATA (for flashing bloatware to a U1 device or for converting a U device from one carrier's bloatware to a different one), let me know and I'll get it for you

Thanks for the firmware links!
Odin blocks flashing from U to U1 or U1 to U. To successfully flash: Use the patched/modded odin found here.
Patched Odin 3.13.1
For those looking for a modified, modded, or patched odin that is a newer build than all the fake and renamed prince comsy 3.12.3 versions floating around. I patch recent Odin versions to offer similar functionality to the princecomsy; in that...
forum.xda-developers.com
realbbb
Sinker Slime

Anyone from T-Mobile move to u1? If so better or worse. Not sure if I should make the move. Thanks

Is the Verizon userdata available? I have an ATT version and I want to switch to Verizon.
Thanks.

N0v1c3 said:
Is the Verizon userdata available? I have an ATT version and I want to switch to Verizon.
Thanks.
Click to expand...
Click to collapse
U firmware is available via the various firmware download tools like SamFirm and Frija

Hey guys, I'm curious if anybody could help me fix an issue I'm having with flashing. I'm trying to flash from the U variant to the U1 but it seems to be csc locked to TMB. I've tried multiple firmwares, pulling the sim out before flashing and even flashing back and forth from U to U1 I can't seem to get the carrier update pop-up at all. I'm kinda at a loss and would appreciate any help you guys could give me

braxf said:
Hey guys, I'm curious if anybody could help me fix an issue I'm having with flashing. I'm trying to flash from the U variant to the U1 but it seems to be csc locked to TMB. I've tried multiple firmwares, pulling the sim out before flashing and even flashing back and forth from U to U1 I can't seem to get the carrier update pop-up at all. I'm kinda at a loss and would appreciate any help you guys could give me
Click to expand...
Click to collapse
Are you saying the service provider codes stay as TMB/TMB/TMB, even after you flash U1?

Yes the csc is locked to TMB for some reason. I did the full csc non home flash several times with no luck

braxf said:
Yes the csc is locked to TMB for some reason. I did the full csc non home flash several times with no luck
Click to expand...
Click to collapse
S21 Ultra users are reporting the same thing. Not sure what's going on with T-Mo this time

Yes I saw the thread. Do you think a repartition could possibly work? It's much more in depth but it would be a completely clean install

braxf said:
Yes I saw the thread. Do you think a repartition could possibly work? It's much more in depth but it would be a completely clean install
Click to expand...
Click to collapse
If you know how to repartition it, go for it

I don't, I read that you need a pit code. How would you go about getting that?

braxf said:
I don't, I read that you need a pit code. How would you go about getting that?
Click to expand...
Click to collapse
If you mean a PIT file, that's already included in the CSC file. So that is flashed, if you flash that file

So it's relatively the same concept but you use the csc file in the pit section?

braxf said:
So it's relatively the same concept but you use the csc file in the pit section?
Click to expand...
Click to collapse
Huh? No. The only thing that can go in the pit section is the pit file

Oh I misunderstood, you're saying when you flash the csc it automatically flashes that pit file?

braxf said:
Oh I misunderstood, you're saying when you flash the csc it automatically flashes that pit file?
Click to expand...
Click to collapse
Yep

Update: I'm completely lost. I downloaded the Canadian firmware which gave me the xac csc then I flashed back to U1 which also updated to Xaa. But I still showed only t-mobile n41 and 71 bands so I flashed back to U with Verizon bloatware and now I have a Verizon U firmware with xaa csc and still only showing t-mobile bands

braxf said:
Update: I'm completely lost. I downloaded the Canadian firmware which gave me the xac csc then I flashed back to U1 which also updated to Xaa. But I still showed only t-mobile n41 and 71 bands so I flashed back to U with Verizon bloatware and now I have a Verizon U firmware with xaa csc and still only showing t-mobile bands
Click to expand...
Click to collapse
I don't guarantee that any particular bands will work on any particular firmware. Also, carriers don't use every single band in every single area

Changing CSC to receive OTA updates

I bought myself a supposedly brand-new, in-box SM-N960F/DS (so this is the dual-SIM version of the Note 9) using the Exynos 9810 from an online retailer in SEA. As it turns out, the phone has an Android patch level of Nov 2019, so I wanted to update it to the latest Android version available for the phone (Nov 2021). And that's when I found out that my set was an imported set from some other country in SEA, and about Samsung's *wonderful* CSC region-locking 'feature'.
Okay, so basically, I'm going to try to go to a Samsung service centre to see if they can change the CSC on my new phone so that I can receive OTA updates. Failing which, and this is the reason I am making this post, I would like to change the CSC myself and update the phone - using Odin, if I have to.
The phone is using what I believe to be stock ROM with a baseband version of N960FXXS4CSJ1, and a Service provider SW ver. of SAOMC_SM-N960F_OXM_XXV_PP_0010. From what I was able to gather, this means that I have a multi-CSC (OXM) firmware, but it is currently set to generic Vietnam (XXV). The two CSC combinations currently reported are XXV/XME,XXV/SKC.
Now, I have tried to change the CSC by using Google Phone and dialling the *#*#27262826#*#*, and that didn't work for whatever reason. I tried the *#272*IMEI#, and that didn't work either, for whatever reason. I guess I will have to flash a new firmware in myself.
I currently have downloaded via Bifrost both the XXV and the XME latest firmware versions (Security level Nov 2021 as of now). I do not intend to root the phone or anything like that (that said, AIDA64 reports that my device is rooted, for whatever reason). I have also downloaded the Samsung USB drivers for Windows and Odin 3.14.1 (both patched and unpatched). I don't know where I can get the OXM version of the firmware, which would be best, because dual-SIM allows me to slot in an Aussie SIM when I do travel over there.
I would greatly appreciate it if I could be advised as to whether I can simply flash the XME firmware and then receive OTA updates thereafter, or do I flash the XXV firmware and keep a watchout for future updates manually. Or, indeed, what my other options are. Step-by-step instructions would be nice, although I intend on following the tutorial as listed here: https://www.xda-developers.com/how-to-update-samsung-galaxy-smartphone/
Hopefully, I will retain the dual-SIM functionality, along with VoLTE, Wi-Fi Calling, Call recording, and so on and so forth.
Thanks in advance!

just download latest firmware for your phone from here https://www.sammobile.com/firmwares/ (you can select country and operator)
put your phone on download mode and flash with odin. Done!

Does that mean I can disregard what the current CSC is, and I can choose whichever CSC (country) I am currently in regardless of what the Note 9 is set to at the moment?

Greetings all; would appreciate any insights as to whether it will be safe to flash the XME or XXV firmware into my device. I'm more than happy to provide additional information if that would help.