Develop Bugs

How To Get Updates - Unlocked With XAC but No Updates (and other questions)

Hi All:
I followed the "Canadian W XAC Firmware" thread and have been very pleased - except that I have not gotten any updates since the April 1, 2017 Security Patch and the original XAC firmware available (QDE). A screenshot is attached and can be seen below.
This was originally a locked AT&T device that my company bought for me, right now the phone is showing XAA/XAA/ATT. I'm not really concerned about that - it's working fine as a device on TMB. I just want to make sure I'm getting the updates!
I guess this puts a couple questions into play:
Is there a difference between SM-955U and SM-955U1 hardware and/or firmware? Mine is currently on 955U, but it seems like they're fully interchangable - and the unlocked XAA is only under 955U1, as far as I can find.
Since I'm not concerned with TMB's features (which I've actually been able to activate in part anyway through the "IMS Settings" function), is there any danger in flashing the XAA (955U1) firmware?
If this is possible, can I flash the 955U1 firmware over the current firmware without a factory data reset? I'd rather not have to set up everything again.
Thank you!!!

Same issue here. Bought VZW s8+ originally, then flashed 955U1, then flashed TMB CSC. Now the string reads TMB/TMB/VZW. Not getting any update.

hchchchc said:
Same issue here. Bought VZW s8+ originally, then flashed 955U1, then flashed TMB CSC. Now the string reads TMB/TMB/VZW. Not getting any update.
Click to expand...
Click to collapse
You'll never change the last one to TMB. The last code is hardwired into your device in the EFS folder and cannot be changed without root. It only shows what variant you originally received and should have no effect on updates, as far as I know.
---------- Post added at 02:07 PM ---------- Previous post was at 02:00 PM ----------
patchmonkey said:
Hi All:
I followed the "Canadian W XAC Firmware" thread and have been very pleased - except that I have not gotten any updates since the April 1, 2017 Security Patch and the original XAC firmware available (QDE). A screenshot is attached and can be seen below.
This was originally a locked AT&T device that my company bought for me, right now the phone is showing XAA/XAA/ATT. I'm not really concerned about that - it's working fine as a device on TMB. I just want to make sure I'm getting the updates!
I guess this puts a couple questions into play:
Is there a difference between SM-955U and SM-955U1 hardware and/or firmware? Mine is currently on 955U, but it seems like they're fully interchangable - and the unlocked XAA is only under 955U1, as far as I can find.
Since I'm not concerned with TMB's features (which I've actually been able to activate in part anyway through the "IMS Settings" function), is there any danger in flashing the XAA (955U1) firmware?
If this is possible, can I flash the 955U1 firmware over the current firmware without a factory data reset? I'd rather not have to set up everything again.
Thank you!!!
Click to expand...
Click to collapse
No, there's no danger in flashing the XAA U1 firmware. There's several threads that show you how to do it, but it will wipe your device. Use Smart Switch to back everything up to your SD card. Between that, Samsung Cloud, and Google backup, you won't have to set much up again.
Once you've flashed the XAA firmware, you put your T-Mo SIM card in, and it will give a message stating it's switching carriers or something and reboot. You will still be on the unlocked, bloatfree firmware, but it will change your CSC string to TMB/TMB/ATT (the last code can't be changed), and you will have all the T-Mo carrier features except for video calling and RCS texting. If those are important to you, then you can always flash the T-Mo carrier software, but you'll get the bloat with it. (not much bloat on the T-Mo software).
As far as updates, everything I've read said you will receive updates OTA, but I didn't stay on T-Mo firmware long enough to find out. I just switched back to the original XAA firmware, and we haven't received a July update yet.

Something's not right here. Your model name should show as "SM-G955U1". Yours does not - yours shows SM-G955U still. If you want to be on the unlocked firmware, just search here on XDA for the princecomsy odin and download the latest firmware for the unlocked model and flash it. July security patch still isn't released, but having come from the unlocked S7e I can't say I'm surprised.
I don't know why you would need to follow any XAC thread to flash the unlocked firmware - all I did was use the modified odin and flash the unlocked firmware on my TMO S8+. Got the 1st OTA (unlocked U1 OTA) 1 week after flashing to U1.
There's a bunch of misinformation on how to change software versions. There's no reason to change anything with the carrier/region info (XAA/TMO/XAC, etc). As long as you are using a snapdragon S8 you can flash any (snapdragon) carrier firmware using the modified odin.

Flashing Verizon Samsung Note 10 plus N975U to U1 Firmware

Hi guys I got a Verizon N975U note 10 plus and its stuck on Verizon I'm trying to flash it with U1 so I can pop a sim in and changes it to that carrier. Do I just need to flash it with the U1 file here https://androidfilehost.com/?w=files&flid=297980 or will it need something special the build # is SQS2ASJ8

johntudd said:
Hi guys I got a Verizon N975U note 10 plus and its stuck on Verizon I'm trying to flash it with U1 so I can pop a sim in and changes it to that carrier. Do I just need to flash it with the U1 file here https://androidfilehost.com/?w=files&flid=297980 or will it need something special the build # is SQS2ASJ8
Click to expand...
Click to collapse
Can't say for sure it would work on U firmware (lack of first hand experience to verify) as it would for U1.... As long as the phone is network/sim unlocked then you should be able to just put the new sim card in it (and the phone will read the sim card settings and apply them).
Flashing the U1 firmware instructions on flashing U1 firmware have been at link below (bottom of first post). You can get the firmware from that thread also.
https://forum.xda-developers.com/showpost.php?p=80072192&postcount=1
Of course keep in mind that none of this will matter unless the phone is sim/network unlocked. As long as you meet the requirements from Verizon (or the phone was blacklisted for either non payment, lost/stolen or a warranty/insurance exchange that wasn't sent in) then this shouldn't be an issue.

its locked to Verizon at the moment when I put a sim in it will work for a bit then say its not allowed to use another carriers sim at this time.

johntudd said:
its locked to Verizon at the moment when I put a sim in it will work for a bit then say its not allowed to use another carriers sim at this time.
Click to expand...
Click to collapse
Either wait until the phone is able to be unlocked by Verizon, or call them and request that they unlock it for you. Until that happens you will not be able to use a non-verizon sim card.
I would also advise keeping the U firmware for Verizon installed and not flashing the U1 firmware, as the Verizon sim/network unlock requires the carrier firmware... At least that is what I am gathering from various discussions/threads.

johntudd said:
Hi guys I got a Verizon N975U note 10 plus and its stuck on Verizon I'm trying to flash it with U1 so I can pop a sim in and changes it to that carrier. Do I just need to flash it with the U1 file here https://androidfilehost.com/?w=files&flid=297980 or will it need something special the build # is SQS2ASJ8
Click to expand...
Click to collapse
Is your phone carrier locked to Verizon? Has it been activated on Verizon's service for 30 days? If not, I'm pretty sure firmware flashing won't help anything. I'm on a Verizon MVNO and they wouldn't even unlock it for me to use on their own network. I had to activate with them for 30 days.
However, now that mine is unlocked, it's still locked down to Verizon in a lotof ways. My SIM card for my current carrier can't apply an APN, for example, so I have to do it manually. I'm contemplating flashing U1 to fix that issue (I hope).

I have a very similar situation. I bought a Note 10+ N975U (Verizon Unlocked) and I want to take it to U1 and then maybe to Sprint. I tried to go to the OP here and follow instructions. So I downloaded and selected all the files for U1 and apparently I did the "no-no" and got stopped with the SW Rev Check Fail : abl Fused 2 > Binary 1. I looked at what my phone is on and it is the SJ8 (November?) from Verizon. I'm guessing that means the BL file (bootloader?) in the U1 folder (SGO?) is older than what is on my phone? What do I need to do differently? I already tried without selecting the BL file, but it still gives the same error. Any help is appreciated! Thanks in advance!

baumanbt said:
I have a very similar situation. I bought a Note 10+ N975U (Verizon Unlocked) and I want to take it to U1 and then maybe to Sprint. I tried to go to the OP here and follow instructions. So I downloaded and selected all the files for U1 and apparently I did the "no-no" and got stopped with the SW Rev Check Fail : abl Fused 2 > Binary 1. I looked at what my phone is on and it is the SJ8 (November?) from Verizon. I'm guessing that means the BL file (bootloader?) in the U1 folder (SGO?) is older than what is on my phone? What do I need to do differently? I already tried without selecting the BL file, but it still gives the same error. Any help is appreciated! Thanks in advance!
Click to expand...
Click to collapse
The bootloader of the U1 firmware you were trying to flash is lower then what is currently on your phone. So yes you are correct that is the no-no. Also you can not skip the bootloader file when flashing, so that wouldn't have worked.
If you read through that thread you will have found others asking how to go from U to U1 firmware. Also the error within regards to trying to flash a lower bootloader version firmware was also asked and answered. I would encourage you to browse that thread and the Q&A forum because this process has been discussed on more then one occasion... It might contain helpful/useful info for you.
In short you need to get a newer firmware release. Using samfirm or frija apps, or the sammobile website look for the firmware your seeking. Google searching will show you how to obtain samfirm, frija is posted the forum here if I recall correctly.
For U1 the model is SM-N975U1 and the region is XAA.

Can I flash sm-N975U1 AT&T unlocked firmware over sm-N975U AT&T?

My sm-N975U AT&T note 10+ has never ever received any updates.
It's currently at Android 9, N975USQU1AS12, security patch: September 1, 2019. Since I got it in 2019.
I see that the unlocked version SM-975U1 AT&T receives updates frequently and I can easily get the firmware online.
I've not even seen any Android 10 firmware for SM-975U AT&T.
So is it possible to flash SM-975U1 AT&T unlocked over SM-975U AT&T.
Or even just to make it US unlocked with no carrier so I can receive updates from Samsung?

You can flash the N975U1 firmware onto the N975U (and vice versa) so long as the bootloader is the same version (or higher) then what is currently installed on the phone.
Three things to keep in mind:
No way exists to downgrade the bootloader... So if you flash firmware with a newer bootloader and you decide you want to go back you will not be able too.
Bootloader version can be found by doing the following. Looking at your About Phone > Software Version look at the baseband version info.. Start at the far right and count 5 characters to the left (with the first character being the far right one). The number that is the 5th character in will be the bootloader version that is currently on the phone.
The USERDATA isn't always included with the U1 firmware should you desire the AT&T version of it. You should be able to find that in this thread,
For an example the red number is the bootloader version:
N975U1OYM3CTE7
For anything else this question has been discussed here a lot so you won't have any issues finding information about it.

So this will unlock the phone? Does the same go for the Sprint version?

Nickdroid86 said:
So this will unlock the phone? Does the same go for the Sprint version?
Click to expand...
Click to collapse
You can flash the firmware from the N975U1 to the N975U (and vice versa). It doesn't matter the carrier, only the model number matters.
Just be sure to be mindful of the bootloader version.
Flashing the firmware from the N975U1 does not have any relation to the network/sim lock. For network/sim unlocking you will have to ask your provider to do this for you
The term (or name) "unlocked firmware" is derived from the phone it comes from.. The N975U1 is the carrier/network unlocked variant sold by Samsung.

so if i put the, U1 firmware to n975u and i'm out USA. now I will receive all the new updates automatically via OTA?
Excuse me, I am new to the forum, I have a question for you, I have an at & t SM-N975U, this at & t firmware does not update outside the USA, I am in Mexico, which firmware should I use, I want it to update automatically via OTA here in Mexico? t-mobile firmware or U1 firmware, I really appreciate your answer,

hello, my question is similar but regarding the carrier. My Note 10 Plus is AT&T locked, if I flash the SM-N975U1 over the SM-N975U, will that unlock the carrier so i can use anyone outside USA?

No. It won't. You'll have to have AT&T unlock it.

scottusa2008 said:
You can flash the N975U1 firmware onto the N975U (and vice versa) so long as the bootloader is the same version (or higher) then what is currently installed on the phone.
Three things to keep in mind:
No way exists to downgrade the bootloader... So if you flash firmware with a newer bootloader and you decide you want to go back you will not be able too.
Bootloader version can be found by doing the following. Looking at your About Phone > Software Version look at the baseband version info.. Start at the far right and count 5 characters to the left (with the first character being the far right one). The number that is the 5th character in will be the bootloader version that is currently on the phone.
The USERDATA isn't always included with the U1 firmware should you desire the AT&T version of it. You should be able to find that in this thread,
For an example the red number is the bootloader version:
N975U1OYM3CTE7
For anything else this question has been discussed here a lot so you won't have any issues finding information about it.
Click to expand...
Click to collapse
Hello can you please help me too
I'm super new here
So i have the N975U and i live in Europe and i don't get any updates cuz my Note 10+ is the AT&T version and now i want to change it to N975U1 so i can get updates from Samsung themselves.. from Sammobile i downloaded The N975U1OYM7GULD-(XAA) model and also N975U1OYM7GULD-AT&T model while the current one i have is N975USQS7FUI7 so both of them i think should work because they have the same bootloader so my question is since i want to get updates to which one should i flash my phone with? I heard the XAA is better because u get updates directly from Samsung themselves ( even when I'm in Europe ) and the AT&T version is also N975U1 but I'm not sure if i will be getting updates because now I already have the N975U ( probably AT&T model that's why I'm not getting anything ) So what do you think i should do?
I'd appreciate ur help
And sorry for my broken ass English hope you understood..

scottusa2008 said:
You can flash the N975U1 firmware onto the N975U (and vice versa) so long as the bootloader is the same version (or higher) then what is currently installed on the phone.
Three things to keep in mind:
No way exists to downgrade the bootloader... So if you flash firmware with a newer bootloader and you decide you want to go back you will not be able too.
Bootloader version can be found by doing the following. Looking at your About Phone > Software Version look at the baseband version info.. Start at the far right and count 5 characters to the left (with the first character being the far right one). The number that is the 5th character in will be the bootloader version that is currently on the phone.
The USERDATA isn't always included with the U1 firmware should you desire the AT&T version of it. You should be able to find that in this thread,
For an example the red number is the bootloader version:
N975U1OYM3CTE7
For anything else this question has been discussed here a lot so you won't have any issues finding information about it.
Click to expand...
Click to collapse
And should i use Odin patch or just the normal odin? I actually wanted to flash my phone with the Germany version but i don't know if it will work!!? ( You'd use odin patch you want to change region! ) so idk if it would work if i change it from N975U to N975F which is Germany model !!?

Help Flashing Samsung Galaxy S10+ from VZW to Strait-Talk

Hey everyone,
I'm new to flashing phones but have experience flashing other hardware; still, I felt it prudent to ask for some guidance on this being my first attempt:
I have a Straight-Talk phone which is active and working with 4G that I would like to swap the SIM over to use in my Galaxy S10+ from Verizon.
Swapping the SIM without flashing limited the functionality to be contingent on WiFi; 4G would not work correctly.
So I suspect I'll need to flash with unlocked firmware to get it to work properly.
I have downloaded the G975U1_SAU_1.zip which is what I think I'll be needing to pull this off, as well as the latest available download of Odin (3.14.1).
Before I get started, I'd just like to ask some Questions:
Should I leave the intended SIM (Straight-Talk) in the S10+ (Verizon) while I'm flashing, or insert it after the flashing?
Am I using the correct firmware to flash this Verizon phone to work with Strait-Talk? (United States regions)
Also should I back up the intended SIM in some fashion before proceeding with this process (if so what software if any would be advisable for this?)
Is there anything I need to watch out for?
Am I on the right track for what I'm attempting to do?
Thanks in advanced for any help! :highfive:
=Bender

Bender The Great said:
Hey everyone,
I'm new to flashing phones but have experience flashing other hardware; still, I felt it prudent to ask for some guidance on this being my first attempt:
I have a Straight-Talk phone which is active and working with 4G that I would like to swap the SIM over to use in my Galaxy S10+ from Verizon.
Swapping the SIM without flashing limited the functionality to be contingent on WiFi; 4G would not work correctly.
So I suspect I'll need to flash with unlocked firmware to get it to work properly.
I have downloaded the G975U1_SAU_1.zip which is what I think I'll be needing to pull this off, as well as the latest available download of Odin (3.14.1).
Before I get started, I'd just like to ask some Questions:
Should I leave the intended SIM (Straight-Talk) in the S10+ (Verizon) while I'm flashing, or insert it after the flashing?
Am I using the correct firmware to flash this Verizon phone to work with Strait-Talk? (United States regions)
Also should I back up the intended SIM in some fashion before proceeding with this process (if so what software if any would be advisable for this?)
Is there anything I need to watch out for?
Am I on the right track for what I'm attempting to do?
Thanks in advanced for any help! :highfive:
=Bender
Click to expand...
Click to collapse
Insert SIM after flashing. You need the current U1 firmware from sam mobile. You also need the patched version of Odin that's floating around the forums here. No need to backup your SIM, but using Odin will reset your phone to brand new. Nothing that I can think of, you just put the correct Odin file in each slot and hit go. Seems like you're onto it, you need 3 things which are patched Odin, latest firmware, and I think phone drivers so your PC recognizes the phone. Should be able to find these on Samsung website or other parts of the web.

Thanks for the support!
After your encouragement, I rechecked my firmware made sure to acquire the USB Drivers from Samsung.
Successfully flashed the phone and its now working as intended!
:victory:
I used the Frija tool mentioned here to make sure I had the right files.
And the Driver install came from here.
Thanks again for your support! :highfive:
=Bender

No problem man, glad to help. Good you posted links too so others can do the same if they're having issues.

Absolutely!
Anything I can do to help pay it forward.
I should also mention I got my CSC code from the list posted at
Droid Views dot com /how-to-change-csc-in-samsung-galaxy-phones/
(Won't let me post the outside link given that I'm new)
The code was required to use Frija to download the correct firmware.
(The 4GB download averaged at 2.5MB/s)
Here is the list I saw on the aforementioned page; I used XAA
Code:
[LIST]
[*]ACG – Nextech/C Spire
[*]ATT – AT&T
[*]CCT – Comcast
[*]LRA – Bluegrass Cellular
[*]SPR – Sprint (CDMA)
[*]TFN – Tracfone
[*]TMB – T-Mobile
[*]USC – US Cellular
[*]VMU – Virgin Mobile USA
[*]VZW – Verizon
[*]XAA – USA (unbranded/unlocked/default)
[*]XAS – USA (unbranded/unlocked)
[/LIST]

Random questions:
If you start with a Tmobile GM-S975U that is carrier unlocked (got unlock code from tmobile)
Will it work just fine with straight talk? If not Does changing the CSC code work, and to which code?
Is different firmware required? like U1?

Unoid said:
Random questions:
If you start with a Tmobile GM-S975U that is carrier unlocked (got unlock code from tmobile)
Will it work just fine with straight talk? If not Does changing the CSC code work, and to which code?
Is different firmware required? like U1?
Click to expand...
Click to collapse
The U1 software for the S-10 plus is strait from Samsung and has no carrier bloat. All US S-10 pluses are the same, no matter who the carrier is. That means you can flash any vendors rom as long as you don't go backwards on the bootloader version. The phone gets set up by the simm card installed on the first boot. The good things about the U1 software is there is no vendor bloat and your updates come straight from Samsung. Don't forget, you have to us the customized Odin to flash with.
Deatailed info and Odin link can be found here. https://forum.xda-developers.com/s10-plus/how-to/guide-g975f-flashing-megathread-faqs-t3936704

Thanks for the reply. Should straight talk just work? My friend says data isn’t working on tmo firmware. What firmware and Csc code would work with them?

curious, do mobile Hotspot work, or is carrier still able to block it?

OEM Unlock ATT to XAA S20 FE

I feel like I've done a big door.
I work in a cell repair shop and we had an ATT unlocked S20 FE that came in and I liked it so I bought it.
Long story short. I did some reading that you can install the XAA software using patched Odin. This was essential because I'm on Tmobile and didnt get 5G on the ATT firmware.
Easy enough. The device now has 5G access on Tmobile, and identifies itself as SM-G781U1/DS in settings.
The issue I'm facing is now unlocking the bootloader. The XAA firmware doesn't have the option and I'm unable to flash back to ATT firmware without (auth) fail errors in Odin and 'Secure boot check fail: PIT' on download mode.
Here's what I've tried that's failed so far:
- show option using time/date change
- software updating (I do receive OTA)
- flashing stock ATT firmware
- flashing stock TMB firmware
- Fastboot oem unlock (command not found)
- fastboot getvar unlocked (unlocked: no)
I'm about out of ideas, could use some guidance on where to begin looking next, I really like the power of this phone and wanna see what custom roms bring.
Device stats:
Galaxy S20FE SM-G781U (with U1 XAA flash)
CSC: ATT
Build: G781U1UESAGWC7
Service provider info:
G781U1_OYM_TMB_13_0011
TMB/TMB/ATT
Android 13, One UI 5.1

To be honest the custom rom screne for this phone is not so great yet. I imagine once the official support ends we will be getting some well developed custom roms.
As for the bootloader unlock issue, try using smartswitch to restore stock firmware, or try changing only the CSC if the firmware is multi-csc, the oem unlock option might reapper.
What kind of patched odin did you use to flash the XAA firmware? stock odin should be able to flash it too. As far as i am aware north american samsung phones do not offer oem unlock. The option probably dissapeared for good. There was etoken but since you are on android 13 i imagine the exploits have been already patched. You're basically stuck on XAA now. You can try using samkey to change the csc but i doubt that even that can help you oem unlock it.

hoptockets said:
I feel like I've done a big door.
I work in a cell repair shop and we had an ATT unlocked S20 FE that came in and I liked it so I bought it.
Long story short. I did some reading that you can install the XAA software using patched Odin. This was essential because I'm on Tmobile and didnt get 5G on the ATT firmware.
Easy enough. The device now has 5G access on Tmobile, and identifies itself as SM-G781U1/DS in settings.
The issue I'm facing is now unlocking the bootloader. The XAA firmware doesn't have the option and I'm unable to flash back to ATT firmware without (auth) fail errors in Odin and 'Secure boot check fail: PIT' on download mode.
Here's what I've tried that's failed so far:
- show option using time/date change
- software updating (I do receive OTA)
- flashing stock ATT firmware
- flashing stock TMB firmware
- Fastboot oem unlock (command not found)
- fastboot getvar unlocked (unlocked: no)
I'm about out of ideas, could use some guidance on where to begin looking next, I really like the power of this phone and wanna see what custom roms bring.
Device stats:
Galaxy S20FE SM-G781U (with U1 XAA flash)
CSC: ATT
Build: G781U1UESAGWC7
Service provider info:
G781U1_OYM_TMB_13_0011
TMB/TMB/ATT
Android 13, One UI 5.1
Click to expand...
Click to collapse
for some reason Samsung doesn't allow bootloader unlocks in the US anymore. if as a phone repair guy you have the means force older firmware onto the device then you could pay someone to get an unlock token on the DL from a contact of theirs.
downgrading isn't something we can do at all hence me mentioning you maybe having access to resources others don't.
if you could get it onto the very first firmware you'd have a chance, if you can't there's no chance.