ATT S9 Update Issue after 3rd party network unlock - Samsung Galaxy S9 Questions & Answers

Hello Experts,
I have a US ATT SM-G960U. I got it network unlocked outside USA. It is on Android 8 and when checking for updates, it always says its up to date. I also tried through SmartSwitch and its the same. The last security patch was from June 1, 2018.
I have downloaded G960U1 Android 9 with April Security patch from SamMobile and Updato. If I update my mobile through ODIN,
will SM-960 U1 patch work fine with my device?
will it lock the device or will the network unlock still be as is?
will I be able to use the device with other carriers?
will I be able to update the patches in future?
will it affect my device?
Please suggest,

samsunggti9000 said:
Hello Experts,
I have a US ATT SM-G960U. I got it network unlocked outside USA. It is on Android 8 and when checking for updates, it always says its up to date. I also tried through SmartSwitch and its the same. The last security patch was from June 1, 2018.
I have downloaded G960U1 Android 9 with April Security patch from SamMobile and Updato. If I update my mobile through ODIN,
will SM-960 U1 patch work fine with my device?
will it lock the device or will the network unlock still be as is?
will I be able to use the device with other carriers?
will I be able to update the patches in future?
will it affect my device?
Please suggest,
Click to expand...
Click to collapse
Please help me

G960u att imei unlock code

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Where's Unlocked S9 G960U1 XAA Updates?

I haven't seen an over-the-air update for the unlocked S9 G960U1 XAA phone since February 18 2019. I have the January 2019 security patch. Has HTC or Huawei taken over responsibility for the security patching for Samsung?
My carrier happens to be T-Mobile. But the phone was purchased from Samsung and I'm certain I never specified anything about T-Mobile during the purchase process. I see on SamMobile that the XAA CSC has patches through late April 2019. I see that the TMB CSC has no patches beyond February 2019. I have a huge amount of data (music) downloaded onto the phone and would prefer not to wipe it. Any ideas on how best to get the XAA OTA pushed? Or am I destine to sideload the XAA materials from someone like SamMobile?
Thanks in advance for any helpful advice.
TMB Carrier-Specific Customizations overrule unbranded XAA?
I think I may have found an answer to my own question:
https://forum.xda-developers.com/showpost.php?p=79338021&postcount=237
I've got Google Fi sending me a new SIM card. Perhaps when I swap SIMs the "TMB" in the CSC will change/disappear. And then maybe the OTA will work.

Unlock ATT Note10+ 5G update outside USA (SM-N976U)

Hello,
I am new to the unlocking stuff.
I just bought a used ATT Note10+ 5G in Malaysia, model SM-N976U
However the security patch was stuck in May 2020. It could not be updated over the internet or Smart Switch PC.
It says it is the latest s/w (the latest should be July 2020)
I checked Sammobile and discovered 2 firmware updates : USA(TMK) and USA (T-mobile)(TMB)
(tried to include sammobile link here but was disallowed due to new user status)
Which firmware is suitable for my phone?
Is there a way to unlock ATT and receive the normal monthly security update over the internet automatically?
(i saw Odin in youtube and have basic idea how to flash it)
Appreciate any advice. Thank you
SCitta said:
Hello,
I am new to the unlocking stuff.
I just bought a used ATT Note10+ 5G in Malaysia, model SM-N976U
However the security patch was stuck in May 2020. It could not be updated over the internet or Smart Switch PC.
It says it is the latest s/w (the latest should be July 2020)
I checked Sammobile and discovered 2 firmware updates : USA(TMK) and USA (T-mobile)(TMB)
(tried to include sammobile link here but was disallowed due to new user status)
Which firmware is suitable for my phone?
Is there a way to unlock ATT and receive the normal monthly security update over the internet automatically?
(i saw Odin in youtube and have basic idea how to flash it)
Appreciate any advice. Thank you
Click to expand...
Click to collapse
A thread already exists with the answers to your questions.
https://forum.xda-developers.com/galaxy-note-10+/how-to/att-note-10-5g-n976u-firmware-files-t4059721
No unbranded firmware version exists as of yet.. so you will have to flash a carrier specific firmware.
https://forum.xda-developers.com/showpost.php?p=81981925&postcount=3
Thank for for the link provided.
Based on the link information, i can download the 4 base files from sammobile (either TMK or TMB) and add USERDATA ATT N976USQS3BTF4 to flash it.
Is that correct?
I could find USERDATA ATT N976USQS3BTF4 in easy-firmware website with a purchase fee.
(editied: My phone Active CSC Code is XAA, CSC Country is USA)
SCitta said:
Hello,
I am new to the unlocking stuff.
I just bought a used ATT Note10+ 5G in Malaysia, model SM-N976U
However the security patch was stuck in May 2020. It could not be updated over the internet or Smart Switch PC.
It says it is the latest s/w (the latest should be July 2020)
I checked Sammobile and discovered 2 firmware updates : USA(TMK) and USA (T-mobile)(TMB)
(tried to include sammobile link here but was disallowed due to new user status)
Which firmware is suitable for my phone?
Is there a way to unlock ATT and receive the normal monthly security update over the internet automatically?
(i saw Odin in youtube and have basic idea how to flash it)
Appreciate any advice. Thank you
Click to expand...
Click to collapse
Hi SCitta,
Fellow Malaysian having the same problem as you. But my problem now is that I have Odin and the latest firmware (XAA) but Odin is showing failed to establish connection. How did you do it with yours?
Am using the AT&T version of the Note 10+.
KhairilH said:
Hi SCitta,
Fellow Malaysian having the same problem as you. But my problem now is that I have Odin and the latest firmware (XAA) but Odin is showing failed to establish connection. How did you do it with yours?
Am using the AT&T version of the Note 10+.
Click to expand...
Click to collapse
Never experienced the failed connection before.
Have you installed the SAMSUNG-drivers ? The Samsung Smart Switch PC installation might help to fix the drivers.
Hello everyone I am Malian and I live in Mali I recently bought a n976U locked by at & t since when I was putting a chip from an operator from here I was getting network unlock code So I looked for a way to unlock it for free if possible its like that I stumbled across your forum and read your posts and saw the code * # 272 * Imei # like we could try to change d 'operator with therefore when I put my chip it says "Invalid Sim card inserted" if I try to retype * # 272 * ... # it comes out nothing I'm lost please help me s 'please if possible of course Thank you
#123
Just want to share my experience in this. Bought an ATT N976U from the US and using in Malaysia. Phone came with XAA/XAA/ATT and never received OTA updates.
Downloaded Google phone app and changed CSC to TMB/TMB/ATT using *#*#27262826#*#*
Voila. Received the OTA updates one by one since May2020. Am now on N976USQU5EUC2.
Volte is also working on Celcom.
Did not have to flash firmware. Data not wiped. Everything seemed to be working normal apart from "Tips and Help" in settings crashes every time I click it. Also phone boots with T-Mobile logo now.

Unlocked SM-N975U1 purchased from Microsoft Store -- want to upgrade firmware

I just acquired a new unlocked Galaxy Note 10+ SM-N975U1 a week ago from the Microsoft Store. I got it working on the T-Mobile network without issues except for firmware upgrades. The device automatically downloaded & installed about 5 upgrades but stopped when showing:
Software update information:
Current version: N975U1UEU3CTC9 / N975U1OYM3CTC9 / N975U1UEU3CTC9
Security patch level: April 1, 2020
From what I can tell, this seems to mean that I am running Android 10, but not OneUI 2.5.
I'd like to flash a later security patch level and get the OneUI 2.5 update. Is SamMobile.com the best place to get the latest firmware? If so, should I choose the latest "USA (T-Mobile (TMB)" option even though this is not a T-Mobile locked device? Or, is there a better option to select?
Thanks in advance.

AT&T S20+ 5G not receiving updates

Hi Community,
I bought my S20+ 5G in October and since then it has not received any updates, neither security patches nor Android 11. I called AT&T and Samsung both but they kept putting the blame on each other. By searching online I realized this seems like a theme in these kind of issues. The only option I feel I have at this point is to install the upgrade myself. I'm more concerned with Android 11 than security patches. I still got for security patch from June 2020 and One UI 2.1.
With this context can you please help with the below questions:
1. When I try to look up the firmware using Model:SM-G986U and CSC:ATT in Frija or SamMobile nothing comes up. I'm looking for G986USQU1CTKH. Am I missing something?
2. But it does come up with CSC:TMB. Can I install this version on ATT branded phone?
2a. Is the TMB version exactly same as ATT version?
3. Does this process trip the Knox counter?
4. Does this process void the warranty?
5. Are missing software updates covered under manufacturer warranty?
ScoobyDoo83 said:
Hi Community,
I bought my S20+ 5G in October and since then it has not received any updates, neither security patches nor Android 11. I called AT&T and Samsung both but they kept putting the blame on each other. By searching online I realized this seems like a theme in these kind of issues. The only option I feel I have at this point is to install the upgrade myself. I'm more concerned with Android 11 than security patches. I still got for security patch from June 2020 and One UI 2.1.
With this context can you please help with the below questions:
1. When I try to look up the firmware using Model:SM-G986U and CSC:ATT in Frija or SamMobile nothing comes up. I'm looking for G986USQU1CTKH. Am I missing something?
2. But it does come up with CSC:TMB. Can I install this version on ATT branded phone?
2a. Is the TMB version exactly same as ATT version?
3. Does this process trip the Knox counter?
4. Does this process void the warranty?
5. Are missing software updates covered under manufacturer warranty?
Click to expand...
Click to collapse
AT&T doesn't allow their firmware to be publicly available for any of their devices. Have you attempted updating your device with Smartswitch? Flashing T-mobile's firmware isn't an option to receive updates on your device. This post has information and answers to your questions.
G986U and G986U1 Firmware Links and Flashing Discussion Here
For those who aren't already aware, G986U is the model number of all of the US carrier versions of the S20+. The G986U1 is the model number of the same device, but sold by Samsung SIM unlocked and with no carrier bloatware. Firmware is 100%...
forum.xda-developers.com

Question S901U OTA updates not received

Hello everyone
I bought an S22 with model number S901U (carrier locked T-mobile) from overseas in Dubai that I received unlocled in someway but was stuck on October 2022 security patch and android 12. It says it is up to date and refuses to find newer versions (no updates detected or pushed).
I manually updated the software to the february security patch and android 13 using sam mobile site and odin.
(I used the CSC that matched the device that was TMB/XAA)
After the update, the software version became ASR/XAA,XAA/XAA.
So the first question, what does this ASR stand for, I couldn't find it in any CSC abbreviations.
Secondly, the TMB is not shown, so does this mean that I will start receiving OTA updates directly from samsung?
(From what I understood, the phone is not receiving updates because it is the carrier locked version that has no connection/relation to the carrier, so will this software version change affect this).
After the update, I didn't detect any faults or problems so far, the device is still carrier unlocked and works fine till now.
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