Question No APN, MMS issue - Samsung Galaxy S21 Ultra

Hi all,
I'm using a global, carrier-free, unlocked S21 Ultra updated to the latest OneUI and am having an issue I can't find an answer to.
There are no APN options at all, I can't even add one or reset to default, it just tells me, "access point name settings are not available for this user". Everything besides MMS works but I can't edit anything. When I take out the sim and re-insert it, the proper APN's show up for about 5 seconds and then disappear. It's as if the phone rejects them after receiving them?
I'm on US Mobile. The sim works fine in an iPhone and OnePlus, MMS included, no tweaking involved. My better half has an older Galaxy and the MMS won't work on hers either. I have to assume it's the phone(s) considering it receives the APN and the it works fine on others.
Anyone have any ideas? I'm reaching out to US Mobile but one of the posts I found when searching around said they never figured it out and got a new phone, so I'm not too hopeful. I see they have a Galaxy specific list of instructions, which I've gone through, but it didn't change anything.

I'm have same issues where Apn settings are missing. SMG998U ON straight talk.

Related

[SOLVED] Phone network issue

Hello everyone,
Informations
Phone : Nexus 6
ROM : Euphoria OS 1.0 with included kernel
I have a little problem with the phone network...
I have just install the ROM (3days ago) and everything worked fine.
After the first reboot, I had a network problem: no more network (just phone)
Bluetooth is OK,Wifi also ect...
No extra apps installed.
Any idea?
Thanks
Edit : French phone/network (FreeMobile)
I am having issues over here also. My data randomly stopped working on my way down to memphis, randomly would start to work again. I tried a new rom, it slightly got better, but would cut out of data every 5 min. Kinda got it better by switching to tmo in the apn's. Now just installed sinless, and it is no longer working again.
So, same problem and no fix...? :/
Holy cow! I thought I was the only one! I mean this problem really sucks(and I have wasted a lot of my hours trying to fix it), and have been thinking of creating a thread on this problem until I saw yours.
Okay let me start with what I'm on:
N6: 64gb blue
Rom: Stock
Rooted: Yes
Any other modification: No, only think I did was unlock and do chainfire su root.
Network: VZW
I have had this phone since Dec with no issues other than random reboot every so often.
Now to the problem I had, I went out to the middle of MO for a weekend get away (on Feb 14th). The whole time I was out there it showed 1x even though I was still getting LTE speed. Didn't think much of it until we moved further into the hilly parts of MO were I lost service. Thought it was just where we were at, and thought it would come back once we got back to the hotel we were staying at. It never did. It would say "No Network found" only allow 911 calls.
Spent the next 4 days working With VZW with several trips to the store, and talking to tech support. They made sure my IMEI was not blocked on their side. We used several sim chips, they would all do the same thing, quickly connect then disconnect and go back to no service.
So I did a factory reset, still didn't help. I finally did a fastboot flash of 5.0.1 stock again, this fixed the issue. Until I used titanium backup to restore my sys setting. Then it would drop and not reconnect after the reboot. So I did fastboot flash again and it hasn't happened again since last Thurs. I just restored my app's again to make sure it wouldn't fail to connect over the weekend, and rebooted several times. No issues so far, but I called Motorola and they are RMAing me a new one, because I don't have any trust in this one anymore. They are out of 64gb ones, and they will get back to me in a week.
Questioned to anyone who has gotten a RMA from Motorola:
Are their "like new" replacements okay? I got a few from them when I had my droid x, and they were crap. So I wasn't sure if that is still the same for the N6 or not. I have a feeling its not, but just wanted to get other peoples input on that process.
Thank you for creating this thread, and for everyone's time!
Edit: Had the same issue network wouldn't work, however WIFI, Location, Bluetooth would.
Check your APNs..... make sure you are on the correct one, and that both of APN protocols say IPv4.
Sent from my Nexus 6
APN is for Internet(3G) and MMS, no?
Because we have a phone network (call & SMS) issues.
On my side, APN are OK, but still don't work...
Edit: New !
Everything works fine on :
- Paranoid Android 5 Alpha 1
- Chroma (Latest)
But not work on :
- Euphoria
- Stock ROM
Edit 2 : It works now !!
I seen that I had several issues around the APN side. I mean, I can't add APN, sometime I can. Sometimes APN reseted themselves, sometimes it was OK. Then, I had read the solution above: security tab.
I had just remove my 3rd party lockscreen (HiLocker). Restart the phone and voilĂ  ! After the reboot, my phone ask me the pin code, and all APN are here.
I hope it can help...!
Some times I will see the APN settings, and sometimes I won't. Right now I don't. When it does show up it shows VZWINTERNET selected. There are ton of other options, but they don't work either when the problem was seen.
Is what your experiencing data going in and out? I'm on Sprint and I thought maybe it was just an issue with Sprint. I have or need to read up more on APN because it does get bothersome. I even have issues where sometimes my SMS gets hung up for minutes in sending mode before they actually send. Would be nice to have this corrected.
Sent from my Nexus 6 using Tapatalk
Casper34 said:
Check your APNs..... make sure you are on the correct one, and that both of APN protocols say IPv4.
Sent from my Nexus 6
Click to expand...
Click to collapse
This solved my problem. One of them was on IPv6.
T-Mobile Nexus 6; 32GB
Thanks!!
xjedi said:
This solved my problem. One of them was on IPv6.
T-Mobile Nexus 6; 32GB
Thanks!!
Click to expand...
Click to collapse
The thanks should go to @Circaflex though... he told me how to fix my issue and thought it could be useful here. I'm glad it was.
Sent from my Nexus 6
Casper34 said:
The thanks should go to @Circaflex though... he told me how to fix my issue and thought it could be useful here. I'm glad it was.
Sent from my Nexus 6
Click to expand...
Click to collapse
No my whole problem was that it would drop and no matter what I would do wouldn't reconnect to the network. I tried a lot of things to fix it (see above). APN would appear and then disappear from the menu. Right now its working on the network as of last Thurs. and APN options is not there.
collegencmc said:
No my whole problem was that it would drop and no matter what I would do wouldn't reconnect to the network. I tried a lot of things to fix it (see above). APN would appear and then disappear from the menu. Right now its working on the network as of last Thurs. and APN options is not there.
Click to expand...
Click to collapse
The APN option will not show for a CDMA Carrier, Sprint or VZW, in your case VZW. APNs are set by the Sim from Verizon so you shouldn't be messing with those, nor should the option show up under mobile network settings.
It was like you. Sometimes network was OK, and sometimes, it was down...
So current working theory is that it was a software issue that cause the problem. I'm just unclear as to why it happened, and how to stop it from occurring again . I do have OpenDNS enabled on the phone, could that cause the problem?
Heres my problem, I'll drop out of an LTE zone, and 3G/HSPA will come on line. Only if its on 3G I never get any data, and sometimes with HSPA too. Not until LTE comes back on line again, but then if I'm trying to stream say music 3G/HSPA wont let LTE take over again for a pretty long while.

[Q] at&t using google voice voicemail with straight talk

I'm using straight talk on an at&t s6 edge. Trying to get the google voice voicemail to work. I've tried the mmi code **004*gmnumber# to activate conditional call forwarding, but I always get "couldn't get server response".. Trying to change the voicemail service provider also gives errors. "Can not read data. Network or sim error"
I have tried the individual mmi codes for different kinds of conditional call forwarding, but get same error:"couldn't get server response".
I have read that at&t controls the conditional call forwarding service, being the original carrier for straight talk, but because I don't have an active account, they can not change features for my number.
The ST rep tells me that there might be a hardware specific mmi code that Samsung may provide?
Does anyone have any solutions?
Thanks guys,
Gozirra
Gozirra, I was having a similar problem with my iPhone 6 (on AT&T) and my S6 (on Cricket). I think it may wind up being these phones (both are AT&T branded). I wound up swapping the sim card into a spare (Cricket branded) Moto G LTE and the MMI code worked without issue.
This exactly what I just did and it works. For months I have been trying to forward my Cricket voicemail to Google Voice, from Samsung S5. I couldn't. I called Cricket, they said there's nothing they can do. I then I saw gm2racer's post, used my sim card in my son's Samsung Prime. Voila.
Same issue here with S6 active + straight talk and with youmail as well.. invalid mmi.. straight talk says they dont support conditional forwarding, however 3 windows phones prior all worked on ST (both att and vzw phones)..
Frustrating enough i'm considering switching to tmobile (not willing to switch phones per say, i just got the s6)
I know this isnt the most hit thread on this topic, but today I resolved my issue... I have an AT&T (unlocked cause its older and paid for) Galaxy S6 (SM-G920A), that I simply plugged in the cricket SIM from my older Cricket phone and started using on their network. I got the immediate system text messages that reconfigured most of the call settings and the phone worked fine but in the past couple months, i keep getting complaints that i dont have voice mail set up from callers.
I did, I do, and I have used my google voice number for years now, and use it for my outbound calling (install the gv app and have it set outbound for all to GV). I also use GV as my mailbox... and I know how to use the **004 string to change forwarding (conditional, as in when you dont answer, cant answer, etc).
But with my AT&T S6 and the MM 6.0.1 (DQC1 official AT&T rom) - that 004 string wouldnt work. Neither would changing forwarding settings from the phone settings. They all state they cant talk to the server... and theres no option in my call settings for voicemail to set voice as the handler (versus your carrier).
So I was kind of stuck.. and here is what I did.
I flashed it using odin to the sm-g920aZ QB2 firmware (as in , the Cricket firmware for the S6, 6.0.1 MM version in March 2017).
I know.. it is taking a risk as some people state it doesent work.. some do.. well.. mine did. And since I have never tried to get root or do a custom OS, i am still official (thats all I have ever flashed, was official ROMs), and galaxy pay works, and the phone works, more or less perfectly from what I can tell. In fact, its got a TON less bloatware running a cricket ROM vs AT&T ROM.
And lo and behold, call forwarding works great now. And I actually got a firmware update notice from cricket 5 minutes after it was flashed.. and, well... all I can say is COOL.
I would probably stay with a MM (6.0.1) version of the ROM or match whatever you have now. I understand once you go to nougat, you cant go back to MM, and that may be true for moving between carrier ROMs also.. (cant go from Cricket 7 to at&t 6).
Anyhow.. Ive done a ton of research on this and thought since XDA helped out immensely (thanks everyone for posting roms and such), I would give ya'll a heads up that this worked for me.
I might go ahead and take those cricket firmware updates OTA. I know its a risk, as my phone is really a 920A (it shows as 920AZ now in settings also), but I really think its the exact same hardware... if I brick it I'll let ya'll know.
Confirmed, updates are good.
24br said:
I might go ahead and take those cricket firmware updates OTA. I know its a risk, as my phone is really a 920A (it shows as 920AZ now in settings also), but I really think its the exact same hardware... if I brick it I'll let ya'll know.
Click to expand...
Click to collapse
I let it go ahead and apply all of the recent Cricket updates to the S6 (920AZ) and confirmed its been running fine for 2 days now with no issues and no loss of functionality.
Makes me wonder what setting was changed by the cricket firmware - that allowed call forwarding to work properly and be set/reset/accessed by the device? The network and device didn't change, just the firmware.. but I dont see anything in the APN settings that relates to voice mail (maybe its something else that needs to change to allow CF settings?)
ANyhow.. your mileage may vary.. and Cricket firmware is WAY less bloated than AT&T for sure!

[HELP] Straight Talk Galaxy S5 mobile hotspot.

I've noticed that my Galaxy S5 through Straight Talk is missing quite a bit of options. Like enabling mobile hotspot and adding mobile operators. I was wondering if there was a way to enable these options either through a custom rom (not really wanting to as almost ALL of the posts I see for ST S5's are very incompatible with A LOL of roms. Cyan 13, maverick, etc...) or maybe a module that would give me these settings back. I have root via Odin and TWRP with SuperSU. This phone is supposed to be compatible with all KLTE roms, but no luck finding posts without more negative than positive results.
My main goal is getting the mobile hotspot working.
Sorry is this is in the wrong place. Very sick right now and the mobile version of the site is a tad confusing (as you can see I'm new to posting) but I lurk ALOT and read a lot here.
Same
Have g870a and can access APN and just network unlocked it as we'll in 5.1.1 lolly I have same issue my hotspot shuts down saying contact att for a fix but they can't help I also can't send MMS unless through go messenger now worked fine first few days but ohine started crashing after switch so I erased all and rebooted to non workimg MMS and have tried every trick with APN settings if you find a hotspot fix please inform me I'm not a poster or smart by any means but I know enough bout a little on our phones I've researched it since 2014 when they came out lol
I don't have it period. It is 100% not there on my phone. Any ideas or help?

Nexus 6, T-Mobile and MMS problem

This has been a frustrating issue. My wife and I both have Nexus 6 phones. She has the 32gb & I have the 64gb version. Hers recently started not receiving MMS messages. Anything with a large picture would simply never show up. Anything with a very small graphic or group text would show up as "Non-text content". Here are the steps we've taken to solve this:
1. TMO started by insisting it was an APN issue. So she edited her APN. Didn't help.
2. We then swapped SIMs. Hmmmm. My phone then behaved like hers while hers could then send/receive MMS.
3. TMO said ok maybe it's the SIM. They sent us a new one. SAME result. Her phone wouldn't receive MMS.
4. Out of frustration, I factory reset her phone and reset the APN info. Didn't help. (Cleaned up her phone of some trash programs though. :laugh
5. TMO engineering says they still can't find anything on their end. Elevate to tech supervisor. She tells us to go a TMO store (right near us) to try a THIRD SIM. OK, we do. SAME RESULT. We tried swapping SIMs around again and the same thing happens. My SIM in her phone, everything works. Her SIM in mine, I can't receive MMS.
6. TMO store guy suggests MAYBE (but unlikely) that there is something her account has that's stored on the SIM when its activated that causes the phone to freak. Also says it's above his pay grade .
So now we are again waiting on TMO to poke around further on their end. My question for all you smart types here is:
Has anyone ever heard of this issue? Is there anything you know of that could be causing it? I think it's a bad provisioning somewhere in the dark recesses of TMO. The ONLY change we made to our plans (which seems just coincidental) is that we moved from the 2 lines Unlimited for $100 plan to the over-55 Unlimited plan. We did this maybe 3 weeks ago. But the features are all the same on both plans.
We are both on the same Android 7.0 final OTA firmware updates from Google. NBD92G
Would there be ANY chance that a sideload firmware update would make any difference? We're getting desperate here. Any & all suggestions welcome.
I wonder if her SIM is configured for wifi calling. There has been a conflict between wifi calling and mms for awhile. I've seen it reported several times where this T-Mobile forum post helps in that case
Don't use old firmware... I had issues on certain custom ROMs and old firmware where MMS wouldn't work over WiFi. Never as bad as you were getting.
If you wanna stay stock, sideload the latest OTA to go to NGI55D. Anything older than that is vulnerable to Blueborne exploit, which is a HUGE security concern IMO. I can confirm MMS is working correctly (even with WiFi enabled) on bone stock NGI55D as well as custom ROM Dirty Unicorns v11.7.1 which includes September security patch.
ktmom said:
I wonder if her SIM is configured for wifi calling. There has been a conflict between wifi calling and mms for awhile. I've seen it reported several times where this T-Mobile forum post helps in that case
Click to expand...
Click to collapse
I've had this issue on most LOS roms. i ended up making a custom APN i flash when i try a rom built on LOS.
Yeah, it sure sounds like a problem with account partitioning, or something else with the account that gets associated with the SIM on initial use. What if you try the problem SIM in a phone that is not a Nexus 6? I wonder if you could get a new sim and set it up in a different phone, then transfer it to the problem phone?
OK all, finally got a TMO engineer who agreed with my assessment -- that it was a hidden provisioning problem. She nuked my wife's line and recreated it from scratch. Everything works great now. Frustrating that we had to go through about 15 phone calls and over 3 hours of phone time to get it resolved.
RealSkier said:
OK all, finally got a TMO engineer who agreed with my assessment -- that it was a hidden provisioning problem. She nuked my wife's line and recreated it from scratch. Everything works great now. Frustrating that we had to go through about 15 phone calls and over 3 hours of phone time to get it resolved.
Click to expand...
Click to collapse
Glad they figured this out.

APN Access Unlocked Phone

Hello,
I feel like this has probably been covered before, I have tried to search a bit, but the options that I have been finding (here and other places) either don't work or confuse me.
I recently bought my phone from Best Buy. They did not have a verizon note 8 in stock, but did have an unlocked one in stock. I was told that there was no difference and that it would be better ie. no verizon bloatware.
I thought that this would be a great deal and bought the phone, best buy swapped everything over for me (did not transfer apps and such as I wanted to go through and pick what I wanted to keep). Phone has worked great until 2 days ago (I've had it for just over a week now). I bought it when I was on the road down in Wyoming. Everything functioned like it should.
I travel home to North Dakota and try to send some pictures through text message...MMS? It had been a few days since I had tried it but I get an error. It says "Service not activated on network" and then "server response error". After spending an hour in the verizon store trying to solve this on the phone with a level 2 tech at verizon, they concluded that they weren't able to figure it out because I was running different software than they were used to. They are currently investigating it and will get back to me. I feel that chances are that since I did not get a Verizon phone they will probably just tell me not our problem and good luck!
Anyways, I feel that this is probably an issue with the APN settings, however my phone has them greyed out, I cannot do anything with them. I have researched a few different options, including rooting (don't really want to do) and none of them seem to work. I was hoping that you guys could help me out! I apologize if this isn't the correct forum, I just saw that there seems to be a great wealth of information on here and figured I'd ask.
PS. Mobile data,hotspot,phone calls, regular text,etc all work. It strictly seems to be MMS.
Thanks!
There is an add button in the apn settings. If the greyed out are not correct, you can add your own and then use them.
Sent from my Galaxy Note8 using XDA Labs
Thanks for the response!
Unfortunately even that is greyed out as well. Clicking it doesn't do anything. Also their are three little dots next to the add button and that brings up a greyed out "restore to default" clicking that doesn't do anything either.
On the apn screen it says something along the lines of "current user profile does not have access". I'm starting to think this is something verizon built into the phone or sim card, any other issue I've found similar to mine all seems to be related to Verizon.
Any other suggestions?
Thanks!
Apn setting
Check this out.
https://forum.xda-developers.com/galaxy-note-8/how-to/guide-enable-hot
Try the steps here
Mod Edit
This is strictly related to apn settings, so you might be able to fix this issue
Thanks! I haven't had time to try these but I hopefully can this evening.
Thanks for the responses!
Hey, did you find a solution for editing the APN?
No I didn't...it's all locked by the Verizon sim card. I had to get Best Buy to swap me over to a Verizon phone.
Very unfortunate that they decide to do this.
Well I have a unlocked note 8 on metro and I can edit the apn. You can try to update phone see if th that works. Pr a factory reset.
download quick shortcut maker, search for lte, select com.test.LTEfunctionality, scroll down to LTE APN Setting, Edit APN @heepo18

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