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US AT&T S5 - G900A - Firmware Update Available

Pulling down a 485MB update right now. Haven't found anything as to whether it is truly Lollipop or not... SLOOOOOW download.

reboot... and it's only 4.4.4. Why on God's green Earth would they deploy 4.4.4 when 5.0 is supposed to be ready to roll?

5 will probably be available soon. Just like what Verizon is doing

Keep an eye on this page for GSG5 AT&T updates.
http://www.samsung.com/us/support/faq/FAQ00059646/85721/SM-G900AZKAATT
Update summary
AT&T released a software update for the Samsung Galaxy S 5 (SM-G900A) on February 3, 2015. The update is available to customers to download via Firmware Over The Air (FOTA). Wi-Fi is required for the update and the file size is 487MB.
What's changing?
Android KitKat 4.4.4
Miscellaneous improvements, bug fixes, and security updates
HD Voice capability*
AT&T Service additions:
Mail - ATT Mail (att.net mail)
AT&T Live
Uber
Remote Support
*HD Voice has limited availability in select markets. Deployment is ongoing. HD Voice Requirements: To experience HD Voice, both parties on the call must be located in an AT&T HD Voice coverage area, have an AT&T HD Voice-capable device and SIM with an area code based in an HD Voice coverage area, and have HD Voice set up on their AT&T account. HD Voice-capable device selection is limited at this time.
Incompatible Services/Features: The following services/features are currently incompatible with HD Voice: prepaid service, Smart Limits, Ringback Tones, OfficeDirect, and OfficeReach (for business customers). HD Voice is available at no additional cost; standard voice rates apply and are charged according to your wireless rate plan. For additional product information and service restrictions, visit www.att.com/hdvoice.
What to expect after the update
Although there should be no impacts to settings or data, we recommend that you back up your media files to an SD card, a PC, or using a favorite application (from the Play Store), prior to upgrading the software. You can also backing up and restoring your phone using Samsung Kies.
How to update
Customers will receive an alert and be prompted to download the update, or have the option to initiate the update manually. When prompted, you can postpone the update up to 3 times, and 4 hours per occurrence. After the update has been postponed for the maximum allowable time, your device will automatically download and install the update.
To initiate the update manually, From the Home screen, touch Apps Apps Icon > Settings Settings Icon > About device Settings About Device Icon > Software update > Check for updates.
Follow the prompts.
How to verify the update
From the Home screen, touch Apps Apps Icon > Settings Settings Icon > About device Settings About Device Icon .
The following information will be displayed:
Android version: 4.4.4
Baseband version: G900AUCU2AOA1
Kernel version: 3.4.0-3116194
Build number: KTU84P.G900AUCU2AOA1

Thanks for the notes!
So.. basically unknown fixes, plus more AT&T bloatware to disable?

I guess that depends on how important you feel VoLTE and 4.4.4 updates are.
Lolipop will be coming soon enough.
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app

Yea... I guess they started the work for this update long time ago and decided to just finish it and release it. The AT&T's version of Lollipop is most likely still a several weeks/months away.

VoLTE + fixes in 4.4.4
VoLTE and whatever fixes that came with the 4.4.4 update are more than likely not part of the lollipop 5.0 or 5.0.1 updates.. VoLTE I'm sure is the major reason for the 4.4.4 update being pushed before lollipop.. VoLTE is obviously going to be a major selling point in the future for all carriers.. leaving it out and just jumping to lollipop would be stupid for AT&T.. once all areas receiving the 4.4.4 update have been rolled out they should start rolling out one of the versions of lollipop.. probably before the end of February so as not to be to far behind Verizon

Dont have the update
I have the s5 for at&t and I just checked and it said my software was up to date. any idea why I didnt get it?

AT&T is rolling out the update in "stages", meaning you might receive it later than the other customers. I have 2 Galaxy S5's in family, both are on the same plan and are AT&T-branded, however only one of them have received update. Don't worry and give it some time - unless you live in a region where "HD Voice" is already available this update is not "crucial".

AlexusJ said:
AT&T is rolling out the update in "stages", meaning you might receive it later than the other customers. I have 2 Galaxy S5's in family, both are on the same plan and are AT&T-branded, however only one of them have received update. Don't worry and give it some time - unless you live in a region where "HD Voice" is already available this update is not "crucial".
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Click to collapse
I have an AT&T unlocked model of Galaxy S5. Will I still get the OTA or KIES if I am abroad? Its completely stock, non-rooted. I've changed nothing. My current version is 4.4.2.

ThuGzta said:
I have an AT&T unlocked model of Galaxy S5. Will I still get the OTA or KIES if I am abroad? Its completely stock, non-rooted. I've changed nothing. My current version is 4.4.2.
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Click to collapse
i was wondering exactly the same thing...

If you are not using an AT&T SIM you will not get an update. I don't think you could get the update even if you were using the AT&T SIM and were on a European or Asian network. I haven't seen an update on KIES for an AT&T phone since 4.1.2 on the GS3.

xCAVEMANx said:
If you are not using an AT&T SIM you will not get an update. I don't think you could get the update even if you were using the AT&T SIM and were on a European or Asian network. I haven't seen an update on KIES for an AT&T phone since 4.1.2 on the GS3.
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Click to collapse
i understand. but... there isnt any way to donwload it and flash it by my self??

I'm getting high battery usage a week after this update. Anyone else?

jtenorio83 said:
i understand. but... there isnt any way to donwload it and flash it by my self??
Click to expand...
Click to collapse
There is. Just follow the method that applies to you in this thread. Or you can install safestrap to install.
http://forum.xda-developers.com/showthread.php?t=3021120

please help
CAG-man said:
There is. Just follow the method that applies to you in this thread. Or you can install safestrap to install.
http://forum.xda-developers.com/showthread.php?t=3021120
Click to expand...
Click to collapse
i tried to do it with safetrap and my phone got sofftbrickeso i had to flash stock g900aucu1ance with odin...
i was wondering if someone can give me the full update to flash with odin only????
is that posible????

Lookout might be the source of your drain its higher than Facebook in usage that's happened to me before the way to solve it was to uninstall lookout and reinstall it
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app

Lookout is thirsty
morphfxf said:
I'm getting high battery usage a week after this update. Anyone else?
Click to expand...
Click to collapse
I have Lookout as the top consumer right now at 29%. That's not good. I did that update a week ago, and it was very miserly then. I wonder if a recent LookOut update is the culprit.

ButtonBoy said:
I have Lookout as the top consumer right now at 29%. That's not good. I did that update a week ago, and it was very miserly then. I wonder if a recent LookOut update is the culprit.
Click to expand...
Click to collapse
Lookout is very buggy. Over the course of owning my s5 I've already uninstalled and installed lookout 4 times (which solves the problem for a good while). FInally I decided to turn off the malware scanning and just keep location / lost phone part as that's all I really care about (as a backup to android device managers lost phone feature). I figure the android has built in limited virus protection already and I don't install except from the play store and am not rooted. I haven't had any problems with 4.4.4 but I did a clean wipe and use lookout in a limited fashion.

Impossible to root brand new AT&T Galaxy S5 @ Android 5.0?

I bought this phone over the Note 4 because of permanent root capability.
Now I'm finding that AT&T locked the bootloader and locked down rooting.
Is it even possible or do I now own a piece of junk?
I hate touchwiz, I wanna install a real rom...

changoland said:
I bought this phone over the Note 4 because of permanent root capability.
Now I'm finding that AT&T locked the bootloader and locked down rooting.
Is it even possible or do I now own a piece of junk?
I hate touchwiz, I wanna install a real rom...
Click to expand...
Click to collapse
If it's already on stock 5.0, then yes. Currently no root methods avaliable.

nutt_case said:
If it's already on stock 5.0, then yes. Currently no root methods avaliable.
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Click to collapse
That sucks, I assumed at first that it came out of the box at 5.0, but it must have updated to 5.0 when it restored all my apps through Google during initial setup. Word to the wise: Don't sign into Google on your first boot if you ever want to root this phone! I never had the opportunity, now I've gotta sell a brand new phone, ugh

changoland said:
That sucks, I assumed at first that it came out of the box at 5.0, but it must have updated to 5.0 when it restored all my apps through Google during initial setup. Word to the wise: Don't sign into Google on your first boot if you ever want to root this phone! I never had the opportunity, now I've gotta sell a brand new phone, ugh
Click to expand...
Click to collapse
Not to rub it in, but since other people may read your advice: It is not google or restoring the application that upgraded the phone to 5.0. You most likely got an OTA (over the air update) notice from AT&T which prompted you to update, then you did it, and updated your phone to lollipop.

najoor said:
Not to rub it in, but since other people may read your advice: It is not google or restoring the application that upgraded the phone to 5.0. You most likely got an OTA (over the air update) notice from AT&T which prompted you to update, then you did it, and updated your phone to lollipop.
Click to expand...
Click to collapse
Not to contradict you and come off like an asshole, but that is exactly how I got the 5.0 update. It was fresh out of the box and asked me if I wanted to restore content from my previous phone. I was never prompted for an OTA update and I never in a million years would have ever accepted or agreed to that. I'm just trying to warn anybody else who might end up in the same position I ended up in.

changoland said:
Not to contradict you and come off like an asshole, but that is exactly how I got the 5.0 update. It was fresh out of the box and asked me if I wanted to restore content from my previous phone. I was never prompted for an OTA update and I never in a million years would have ever accepted or agreed to that. I'm just trying to warn anybody else who might end up in the same position I ended up in.
Click to expand...
Click to collapse
I'm sorry, I am not questioning your judgment about this and as always I would like to be wrong about this because then I can I learn something new. The way I understand update mechanisms is that there are three ways things get updated in one's phone: the first is by Google and traditionally Google has only updated parts of the operating system that have to do with Google such as the Play Store or the Google framework etc. and these are considered minor patches to the OS. I have never heard or seen that Google would modify the /system partition as that would defy the entire notion of factory reset. The second is through Samsung. unless you live in certain countries where Samsung sells you a phone unlocked and unattached to a mobile operator the update you get from Samsung is limited to Samsung applications and security patches. Finally, in the United States and countries where phones are sold by cell phone operators the OS update is delegated to the phone companies such as AT&T and t-mobile. that's how you get an update for example from kit Kat to lollipop in the us. there is no documented mechanism that shows how Google can update the OS on a phone sold to you by a phone company. but if you find non anecdotal evidence to the contrary, I would be glad to stand corrected.

najoor said:
I'm sorry, I am not questioning your judgment about this and as always I would like to be wrong about this because then I can I learn something new. The way I understand update mechanisms is that there are three ways things get updated in one's phone: the first is by Google and traditionally Google has only updated parts of the operating system that have to do with Google such as the Play Store or the Google framework etc. and these are considered minor patches to the OS. I have never heard or seen that Google would modify the /system partition as that would defy the entire notion of factory reset. The second is through Samsung. unless you live in certain countries where Samsung sells you a phone unlocked and unattached to a mobile operator the update you get from Samsung is limited to Samsung applications and security patches. Finally, in the United States and countries where phones are sold by cell phone operators the OS update is delegated to the phone companies such as AT&T and t-mobile. that's how you get an update for example from kit Kat to lollipop in the us. there is no documented mechanism that shows how Google can update the OS on a phone sold to you by a phone company. but if you find non anecdotal evidence to the contrary, I would be glad to stand corrected.
Click to expand...
Click to collapse
I mean, I'm not stating that it was Google who pushed this update, it is an AT&T ROM after all. The reality of my situation is that the phone was doing an initial startup and the very first thing that happened was it launched into the initial setup. Once it got to the screen that asked me for my Google login to re-install all the apps that were linked to my account, that was the last time I had any input over the matter. It had to be during this time that the 5.0 update was downloaded/installed as well because this process took about an hour while it downloaded everything. Unfortunately it gives no information about whats going on whatsoever except for showing a splash screen that you can't escape from as it continued to download everything. Once it finished, I was at 5.0. I never once saw the phone operating or a home screen on anything that wasn't 5.0. So it very well could have been that AT&T pushed the OTA update during this process. I just had zero control over what was happening and was never prompted for an OTA update. I just entered my Google credentials, it went to the splash screen, and when it finished it spit me out to the home screen at 5.0.

changoland said:
I mean, I'm not stating that it was Google who pushed this update, it is an AT&T ROM after all. The reality of my situation is that the phone was doing an initial startup and the very first thing that happened was it launched into the initial setup. Once it got to the screen that asked me for my Google login to re-install all the apps that were linked to my account, that was the last time I had any input over the matter. It had to be during this time that the 5.0 update was downloaded/installed as well because this process took about an hour while it downloaded everything. Unfortunately it gives no information about whats going on whatsoever except for showing a splash screen that you can't escape from as it continued to download everything. Once it finished, I was at 5.0. I never once saw the phone operating or a home screen on anything that wasn't 5.0. So it very well could have been that AT&T pushed the OTA update during this process. I just had zero control over what was happening and was never prompted for an OTA update. I just entered my Google credentials, it went to the splash screen, and when it finished it spit me out to the home screen at 5.0.
Click to expand...
Click to collapse
My S5 looks for system updates on the initial setup each time. It probably upgraded to the new OS as your were doing your initial setup of the device.

That's correct it does look for updates on initial setup. I have made it a good practice not to connect to Internet during the initial setup. This will keep it from looking or installing any updates. Updates will not push unless your connected to Internet ( unless it's been days and you keep denying them ).

This is the procedure I follow each time I buy a new phone:
1- Take the sim card out and turn the phone on. If the phone co-operates go to step 3.
2- Put the sim card back in and turn the phone on.
3- During the initial setup decline to connect to WiFi if the phone accepts that.
4- Immediately after the set up is complete, go to Settings -> Security -> security policy updates (or something like that) and turn automatic updates off AND set your preferred networks to WiFi only.
5- go to Settings -> about device -> software update, AND IF THERE IS AN OPTION PRESENT, disable automatic updates.
6- Root the phone if possible. If not move to step 8.
7- After obtaining root, disable the update related apks. They are typically called: LocalFota.apk, FotaClient.apk, SamsungApps.apk, SPDClient.apk, SyncmlD.apk, and wssyncmlnps.apk, or variations of these names. They are all under either /system/app or /system/priv-app.
8- It is now (relatively) safe to connect to the internet.
9- The first time you log in to playstore, quickly go to its settings and disable automatic update.

najoor said:
This is the procedure I follow each time I buy a new phone:
1- Take the sim card out and turn the phone on. If the phone co-operates go to step 3.
2- Put the sim card back in and turn the phone on.
3- During the initial setup decline to connect to WiFi if the phone accepts that.
4- Immediately after the set up is complete, go to Settings -> Security -> security policy updates (or something like that) and turn automatic updates off AND set your preferred networks to WiFi only.
5- go to Settings -> about device -> software update, AND IF THERE IS AN OPTION PRESENT, disable automatic updates.
6- Root the phone if possible. If not move to step 8.
7- After obtaining root, disable the update related apks. They are typically called: LocalFota.apk, FotaClient.apk, SamsungApps.apk, SPDClient.apk, SyncmlD.apk, and wssyncmlnps.apk, or variations of these names. They are all under either /system/app or /system/priv-app.
8- It is now (relatively) safe to connect to the internet.
9- The first time you log in to playstore, quickly go to its settings and disable automatic update.
Click to expand...
Click to collapse
Those are good steps, one side note that i do is i don't connect to Internet until after i sign into Google play and set the update to " do not update ". I also hardly ever connect to the Internet anyhow since my phones data is faster than my slow a$$ Internet. Ha

dirtydodge said:
Those are good steps, one side note that i do is i don't connect to Internet until after i sign into Google play and set the update to " do not update ". I also hardly ever connect to the Internet anyhow since my phones data is faster than my slow a$$ Internet. Ha
Click to expand...
Click to collapse
Yeah, but somehow that never worked for me. Play store doesn't let me log in until I connect to the internet and before logging in I cannot change the settings.

najoor said:
Yeah, but somehow that never worked for me. Play store doesn't let me log in until I connect to the internet and before logging in I cannot change the settings.
Click to expand...
Click to collapse
If you open the play store and log in that way it normally won't, but if you go to settings, accounts, and add your Google account that way, let the phone set about 5 min while it sets up then you should be able to log in.

changoland said:
That sucks, I assumed at first that it came out of the box at 5.0, but it must have updated to 5.0 when it restored all my apps through Google during initial setup...
Click to expand...
Click to collapse
What makes you think it didn't come from at&t with 5.0 already installed? I had to have my phone replaced recently and the new one definitely had 5.0 pre-installed.

I just received one, 5.0 out of the box also.

Ok, so I'm not the only one who received a 5.0 out of the box. too bad AT&T are such pieces of s***

Yeah, I entered this thread with the intention of posting that it was to my understanding that unless you find some old stock somewhere, all new AT&T Galaxy S5s are coming with 5.0 pre-installed.
If the OP had taken an OTA while setting up his phone I'm sure he would have noticed the reboot to recovery and the little Android dude with the blue progress bar under him as his phone updated. OTA updates don't silently install.
The days of walking out of the store with a brand new S5 and rooting it right away have gone away until someone finds a new exploit that will work on the stock 5.0.

I'm looking for a used S5 to use on Straight Talk. I want to root it and use the mobile hotspot feature. Is their a particular build number or kernel I should be looking for? I want to have 5.0 also. Maybe a ROM like Sixperience
THANKS

Downgrade and root?
I had the same issue, replaced my broken S5 and the new one came with 5.0 stock.
Would it possible to downgrade, to 4.4.2 KitKat, root via Towelroot, and then upgrade again? Would be tedious, but I am sick of AT&T's bull****. It's a moral victory as much as just looking for more ease-of-use.

bigben7310 said:
I had the same issue, replaced my broken S5 and the new one came with 5.0 stock.
Would it possible to downgrade, to 4.4.2 KitKat, root via Towelroot, and then upgrade again? Would be tedious, but I am sick of AT&T's bull****. It's a moral victory as much as just looking for more ease-of-use.
Click to expand...
Click to collapse
Not possible as of now
Sent from my SAMSUNG-SM-G900A using Tapatalk

US Cellular Note 9 no longer updating on AT&T?

Back in July I got a steal on a new US Cellular Galaxy Note 9, so I immediately threw my iPhone 6S SIM card into it and went through several rounds of software updates. After the last update the splash screen switched to AT&T and it suddenly had several AT&T apps. It didn't TOTALLY eliminate the US Cellular stuff because I had to delete at least one app and change the Samsung browser's default home page.
Due to the iPhone SIM card and some stuff on AT&T's side, it would not do VoLTE or WiFi calling until I got a new SIM and had AT&T use the IMEI from an AT&T Galaxy Note 9 (read it off one from the store). I did that in late August and the only remaining issue O noticed was that my MMS messages will not download as long as I am on WiFi.
I just noticed what may be a new issue: I think I stopped getting carrier updates. Looking on AT&T's site, I see that they have multiple newer updates with the latest from September 18th:
https://www.att.com/devicehowto/tut...tep_KM1278532?make=Samsung&model=SamsungN960U
My "Security Patch Level" says May 1, 2019, while AT&T's website says that there have been 4 updates since then (latest at Security Patch Level September 1, 2019).
My baseband version doesn't quite match any of the ones associated with AT&T updates, though their May 22nd update seems to be the most similar (AT&T's N960USQS1CSE1 compared with my N960USQU1CSE3).
I recall that the new phone updated multiple times and was still on Oreo before it updated again to Pie, and again to AT&T-flavored Pie. I figure the final update was really just adding the AT&T apps and splash screen, but it somehow stopped me from getting further updates from US Cellular. I'm pretty sure I had an AT&T SIM card inserted for all of my updates.
On that note, I believe I tossed the original SIM and US Cellular does not operate in my region (only showed up here through a salvage store). I'm not easily able to get another US Cellular SIM for triggering it to revert to a US Cellular ROM. I'm not interested in custom ROMs and all that and ultimately just want to keep my phone up to date the same way a normal AT&T customer would after buying theirs from AT&T. I thought the Note 9 adding carrier customizations to match the inserted SIM would take care of all this automatically (half the point, right?) but I guess I was wrong.
Is it possible to get carrier updates like I was getting before? If not, what would you guys recommend for getting up to date and staying up to date? Thanks!

CZroe said:
Back in July I got a steal on a new US Cellular Galaxy Note 9, so I immediately threw my iPhone 6S SIM card into it and went through several rounds of software updates. After the last update the splash screen switched to AT&T and it suddenly had several AT&T apps. It didn't TOTALLY eliminate the US Cellular stuff because I had to delete at least one app and change the Samsung browser's default home page.
Due to the iPhone SIM card and some stuff on AT&T's side, it would not do VoLTE or WiFi calling until I got a new SIM and had AT&T use the IMEI from an AT&T Galaxy Note 9 (read it off one from the store). I did that in late August and the only remaining issue O noticed was that my MMS messages will not download as long as I am on WiFi.
I just noticed what may be a new issue: I think I stopped getting carrier updates. Looking on AT&T's site, I see that they have multiple newer updates with the latest from September 18th:
https://www.att.com/devicehowto/tut...tep_KM1278532?make=Samsung&model=SamsungN960U
My "Security Patch Level" says May 1, 2019, while AT&T's website says that there have been 4 updates since then (latest at Security Patch Level September 1, 2019).
My baseband version doesn't quite match any of the ones associated with AT&T updates, though their May 22nd update seems to be the most similar (AT&T's N960USQS1CSE1 compared with my N960USQU1CSE3).
I recall that the new phone updated multiple times and was still on Oreo before it updated again to Pie, and again to AT&T-flavored Pie. I figure the final update was really just adding the AT&T apps and splash screen, but it somehow stopped me from getting further updates from US Cellular. I'm pretty sure I had an AT&T SIM card inserted for all of my updates.
On that note, I believe I tossed the original SIM and US Cellular does not operate in my region (only showed up here through a salvage store). I'm not easily able to get another US Cellular SIM for triggering it to revert to a US Cellular ROM. I'm not interested in custom ROMs and all that and ultimately just want to keep my phone up to date the same way a normal AT&T customer would after buying theirs from AT&T. I thought the Note 9 adding carrier customizations to match the inserted SIM would take care of all this automatically (half the point, right?) but I guess I was wrong.
Is it possible to get carrier updates like I was getting before? If not, what would you guys recommend for getting up to date and staying up to date? Thanks!
Click to expand...
Click to collapse
Attached is the link for my last update , I'm using it on AT&T , phone is original from AT&T, and all is Ok for me, I hope can help you.
https://www.google.com/amp/s/forum....note-9-att-rom-update-sept-2019-t3979303/amp/

Thunderxxx said:
Attached is the link for my last update , I'm using it on AT&T , phone is original from AT&T, and all is Ok for me, I hope can help you.
https://www.google.com/amp/s/forum....note-9-att-rom-update-sept-2019-t3979303/amp/
Click to expand...
Click to collapse
I'll check it out when I get back to my PC. Thanks! I assume it's something I need to flash with Odin?

A few questions about the Pixel 5

So I have a few questions that searching for answers has either been vague or given me old, outdated articles and answers if any at all. Coming here to see if maybe you guys can help bring some clarity.
I still have not received the November security patch. I'm using an Unlocked Pixel 5 with an AT&T sim. This is the first time I have not been able to get an OTA update on my phone when I saw it was released. I was using the 12 beta on my device but my wife hasn't gotten one either.
Pixel tips mentions the enhanced voice typing on my phone but I do not have it available to me. I am on the Gboard beta program and I briefly got it when it was in it's trial rounds and it works great but is no longer available. Is this a 6/6P exclusive?

personally. i would backup everything on the phone(s) you want to save. then do a fully factory wipe and fresh install on the latest image from here https://developers.google.com/android/images#barbet make sure you select the correct model when flashing. the web flashing is extremely easy to use. just make sure you use chrome to do this all in. also make sure you install the usb drivers first before attempting to flash the phone. otherwise it will never see the phone connected to the computer.
one thing i have learned over the years of messing with computers and phones. it sometimes best to start off with a fresh copy of your OS than spending days or weeks trying to troubleshoot the problem only to have it show back up next update.

AT&T maybe controlling the OTA update for security patches. Google has sent out the updates to US vendors. Double check that you have OTA enabled. It maybe found in setting app - System - System update. Unless AT&T moved it somewhere else.
Check in the Settings app: System - Languages & input - On-screen keyboard. Verify that Gboard is listed as the option for Multilingual typing and that Google Voice Typing is set to Automatic. There may also by an item which has Google Voice Type [Legacy] = Automatic. I would not be concerned if does not exist. However if it is there and no equal to Automatic, then investigate further. Finally Voice typing is enable in Gboard by opening Gmail or Messages and select the "..." icon above the keyboard, then Settings - Voice typing - Use voice typing

Your thread subject says you have a Pixel 5 but you are posting in the Pixel 5a forum. Please either confirm that you have a 5a or move the thread to the 5 forums. It's hard to help you if we don't know which you have.
Since it is an Unlocked phone it is getting its OS updates directly from Google, not from AT&T. If you had a locked phone from AT&T you might well not be receiving timely OS updates. That is why one should never buy a phone from a network operator. Can you confirm that you did not buy this phone from AT&T? In this context "Unlocked" means the bootloader is unlocked or at least unlockable, not that the SIM card is unlocked to be able to work on another network.
If you do have an unlockable phone then the best thing to do right now is to backup your data and programs, then download and install the latest factory image. That will get you to a solid foundation for future OTAs. I would stay off the beta track from here forward.

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