Develop Bugs

Verizon Note 8...T-Mobile sim - help

Hello all, new here and I just purchased a Note 8 from Verizon. The device is paid off fully and i wish to use my T-Mobile simcard in it but it does not seem to be picking up a signal. I did update the verizon software to the latest version when i had my verizon sim card inserted. Verizon customer service told me i need to reset to factor setting then my t-mobile sim should work but this has not helped.
How can i get my t-mobile sim to work? Any help appreciated as i am new to android phones!
Thanks

Hi there, you must flash the new N950U1 2BQK1 or N950U 2BQK2 stock firmware to have full access of T-MOBILE Network. It's the only way it will work, I have AT&T NOTE 8 working on Verizon network with zero problem.
---------- Post added at 02:35 PM ---------- Previous post was at 02:31 PM ----------
It's a very easy process to flash the 4 US Carriers firmware, I have done it more than 50 times and I'm not a developer.

kdecoteau1 said:
Hi there, you must flash the new N950U1 2BQK1 or N950U 2BQK2 stock firmware to have full access of T-MOBILE Network. It's the only way it will work, I have AT&T NOTE 8 working on Verizon network with zero problem.
---------- Post added at 02:35 PM ---------- Previous post was at 02:31 PM ----------
It's a very easy process to flash the 4 US Carriers firmware, I have done it more than 50 times and I'm not a developer.
Click to expand...
Click to collapse
I would like to know where to get the firmware and with what do you flash it with? Is there a instructions thread or link.
It's been over 5 years since I have tinkered with a Samsung device.

Hi there. You'll need to have your Note 8 Bootloader version on level 2, meaning 2BQK2, 2BQJA or anything with 2 before the last 4 digits.
1) tmobile SIM card in device
2) Odin v3.12.7 make sure extract
3) 2BQK2 firmware extract all files
4) put all 4 set of firmware files in the right manner, bl,ap,cp and csc. Don't used home-csc only CSC.
Odin and firmware https://androidfilehost.com/?fid=673791459329067572 2BQK2
https://androidfilehost.com/?fid=962157660013069130 2BQL5
https://drive.google.com/open?id=1bRz4RQzmloSgsuYmyLu92cktT_f8hIYp
Unlock firmware
1) any carrier SIM card
2) Odin v3.12.5 Prince Comsey or modified Odin, make sure extract
3) 2BQK1 firmware, extract all files.
4) put all 4 set of firmware files in the right manner, bl,ap,cp and csc. Don't used home-csc only CSC
Odin and firmware https://androidfilehost.com/?fid=745849072291691586 2BQK1
https://androidfilehost.com/?fid=817906626617955896 2BQL2
https://drive.google.com/open?id=1Lw79Q5npvMRdME33-ioqy692ClZ36n4U
First instructions is for if you want stock US CARRIER BLOATWARE FIRMWARE, second instructions is if you want SAMSUNG STOCK FIRMWARE. Follow steps and everything will be fine, happy flashing.

So wait, I have a Verizon Note 8 (currently using MetroPCS perfectly), but I wanted a stock Samsung ROM (without the Verizon crap on it), I can just flash the second set of files instead and done with it?

Yes

Can I use a gsm sim card and a verizon sim card at the same time on verizon branded phone? I see you have to flash the firmware above but am wondering if this would help me.

So much misinformation in this thread.
I don't even know where to start:
The OP was asking why his T-Monile SIM wouldn't work. It doesnt matter which firmware you're on, if the Note 8 is unlocked (the Verizon Note 8 IS unlocked), and it has a clean IMEI, and your SIM is already activated, then it will get 4G LTE. I know. I have a Verizon Note 8, and use it on Tmobile. I used it for over 24 hours with my T-Mo SIM but running thr Verizon firmware with no issues. Only reason I flashed T-Mobile firmware was to rid myself of Verizon bloat and to get wifi calling.
As far as bootloader, that has no effect on the SIM card working. The OP would need a v2 bootloader firmware if his current firmwarealso had the v2 bootload. It probably does, so thats a moot point, but the implication was the v2 bootloader was the only one that would make his SIM work.
I hope the OP got it all figured out.

mmdpkaaa said:
Hello all, new here and I just purchased a Note 8 from Verizon. The device is paid off fully and i wish to use my T-Mobile simcard in it but it does not seem to be picking up a signal. I did update the verizon software to the latest version when i had my verizon sim card inserted. Verizon customer service told me i need to reset to factor setting then my t-mobile sim should work but this has not helped.
How can i get my t-mobile sim to work? Any help appreciated as i am new to android phones!
Thanks
Click to expand...
Click to collapse
If you want T-Mobile to work best follow the switching carrier guide to change CSC code to TMB and then flash the Latest T-Mobile Firmware...
https://forum.xda-developers.com/showpost.php?p=74087340&postcount=1
unitop4 said:
Can I use a gsm sim card and a verizon sim card at the same time on verizon branded phone? I see you have to flash the firmware above but am wondering if this would help me.
Click to expand...
Click to collapse
No way to dual SIM US models without trying to modify the SIM tray...and some have damaged trying to...

BlueFox721 said:
If you want T-Mobile to work best follow the switching carrier guide to change CSC code to TMB and then flash the Latest T-Mobile Firmware...
https://forum.xda-developers.com/showpost.php?p=74087340&postcount=1
No way to dual SIM US models without trying to modify the SIM tray...and some have damaged trying to...
Click to expand...
Click to collapse
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.

Mr. Orange 645 said:
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.
Click to expand...
Click to collapse
Another user had SIM issues and flashed back to factory (theirs was unlocked) then changed carriers and SIM worked again...sometimes a clean flash can work...

Hi all. For me I flash all firmware at clean wipe, never any issues. I have an unlock AT&T Note 8 unlock running the latest Verizon firmware with VZW SIM active. I also have a t-mobile S8+ unlock and running the latest U1 firmware and working with Verizon SIM active. I constantly switch my firmware between tmobile, verizon and at&t to see performance and what ever else feature added.

kdecoteau1 said:
Hi all. For me I flash all firmware at clean wipe, never any issues. I have an unlock AT&T Note 8 unlock running the latest Verizon firmware with VZW SIM active. I also have a t-mobile S8+ unlock and running the latest U1 firmware and working with Verizon SIM active. I constantly switch my firmware between tmobile, verizon and at&t to see performance and what ever else feature added.
Click to expand...
Click to collapse
How did you get ATT N8 to work on VZW? I flashed my Tmo to VZW and i could never get speeds above 1mpbs. Even with unlocked firmware it did not get anywhere with VZW. I heard that its because the IMEI is not in VZWs database.

Hi there. My AT&T Note 8 works great on Verizon network, it's running the latest N950U1 Firmware 2BQL2, everything works great. It will work good on T-Mobile too, lately tmobile network giving trouble, sometimes less than 1 mbps on download. Since June 2017 I been having trouble with tmobile network in my area and around, so I switch to Verizon, couldn't bother the crappie service. My location I get 215 mbps on my note 8, IPhone 8 plus 147mbps download. I prefer Tmobile but it's not working good in area anymore.

[/COLOR]
Mr. Orange 645 said:
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.
Click to expand...
Click to collapse
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will doing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.

Pastor X said:
[/COLOR]
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will performing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.
Click to expand...
Click to collapse
Nevermind, I fixed it. I had to perform the carrier switch and flash Tmo's firmware. Running perfectly!

Pastor X said:
[/COLOR]
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will doing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.
Click to expand...
Click to collapse
Omg exacly whats happening to me? So what steps have you guys followed? Should I switch to T-mobile, or to factory unlocked?
I have Verizon phone, unlocked, and I use T-mobile sim card.
I would appreciate the help
Sent from my SM-N950U using Tapatalk

Verizion note8 with tmobile sim card
This is what happened when I changed carriers from the original verizon note8, on verizon network, with verizon sim and the most recent verizon pie update, to a carriers sim, that is tmobile service. And what happens, I didn't even think was possible... I put the new carriers sim in, truconnect, booted and let the phone register the new sim and network. Checked for update.... the was one, let the phone download and update. And you know how Verizon's boot logo is... it wasn't anymore. Booted the tmobile boot logo and sounds, strange. I'm not super noob and the little bit of knowledge and experience that I do have with roms and updates across carriers usually require physically flashing the rom. Correct me if I'm mistaking. Continuing.... optimizing apps....., huh?! The update flashed the tmobile software, without effecting any personally installed apps. Though the update did remove all the verzion software/bloatware, without permissions, and installed tmobile apps. 2 that are meant for user usage. They are tmobiles device unlock and the tmobile app. Which I might add, do not function, I surmise, because in not on the actual main tmobile network, but a scabbed on. I have never seen or experienced anything of the short. Please tell me if this is normal.? I was a bit upset. I did not give any carrier the permission to delete or install any app on my phone. But maybe things have changed since I dabbled. And If they have, maybe this might help the people that have been using Odin to get tmobile version rom while originally being a verzion phone. I dont think it's normal. Please tell me if this has happened to you.

How to flash a AT&T Galaxy S9 SM-G960U with a T-Mobile Stock Rom?

Hello,
I've been trying to find my answers on how to flash a AT&T GS9 SM-G960U with a T-Mobile S9 Stock Firmware\ROM.
I found this thread and although it's fairly close to what I am trying to do, I didn't want to post this there because they are talking about flashing U1 to U and I'm not sure if that is what I need to do exactly. https://forum.xda-developers.com/galaxy-s9/how-to/how-to-flash-u1-firmware-to-device-t3765200 from this thread, I've followed the initial steps and although Odin (Moded Odin v3.13.1 Raymonf ) tells me that the flash passed, upon reboot, the phone does not have the TMO firmware, it's still the original AT&T firmware. The only thing that it did do was add the TMO Visual VM icon\app.
I was informed of being able to download the TMO firmware from here: https://www.droiddosh.com/2018/04/samsung-galaxy-s9-sm-g960u-firmware-tmobile-usa-G960USQU1ARBG.html
Am I doing something wrong here? It seems that maybe these US models do not offer the OEM Bootloader unlocker option in developer settings unless you purchase the U1 version direct from Samsung that does not have a locked boot loader? I got this phone at no cost so that is also why I did not purchased from Samsung directly.
Any guidance and help would be appreciated.
Thank you

US carrier models have locked bootloaders, no way to root or install custom roms.
We should be able to flash between carrier versions/CSCs like we could with the S8, but the process is different and I've only read of a few people finding success in trying. The voicemail app you're seeing is due to flashing the T-Mobile userdata partition. This is the bloat partition - doesn't actually change device features, etc.

Any chance anybody has success doing this? It seems like a "Must Have" feature to switch carrier roms on the G960U between carriers, including Boot Screen/Logo, Firmware, Bloatware, etc.
All the goodies.
Any help?
Thank you,

I've done it!
dovid said:
Any chance anybody has success doing this? It seems like a "Must Have" feature to switch carrier roms on the G960U between carriers, including Boot Screen/Logo, Firmware, Bloatware, etc.
All the goodies.
Any help?
Thank you,
Click to expand...
Click to collapse
I've completed this task tonight thanks to some great help from a user that stepped me through it on a TMO Forum.
First an FYI, I first was able to flash my AT&T S9 version from SM-960U to a Stock SM-960U1. It worked great. After that, I was able to flash the TMO Rom and it's also working perfect. I'm not sure if it's required or not to flash the phone to a U1 first or if the TMO Rom can just be flashed. After I flashed the TMO firmware, I had no issues downloading and installing the latest TMO update. (My device is unlocked as well)
It's best to use Samsung switch first to backup your texts, pics, etc. first if you want to restore them to the device after completing the flash. The below instructions will start the phone up as if it was new out if the box.
Here is what I was provided with and the steps I followed.
To Flash the SM-G960U to a SM-G960U1
1. Allow\Enable USB Debugging in Developers settings.
2. Download the U1 Firmware here: https://androidfilehost.com/?w=files&flid=257063
(this is the U1 from Samsung, it's compressed but once extracted it will be around 4GB's of data.)
3. Download the ADB tools: https://devfiles.co/download/PDYvOWBg/platform-tools-latest-windows.zip. Create a folder on your desktop and name it ADB (for easy reference)
4. Download Odin: https://drive.google.com/file/d/10dSyPTuccP8Km9MnDrvbRdS-CAcgFZB3/view
5. From windows, run command prompt, in the command prompt type the following: cd C:\Users\XXX\Desktop\ADB
(XXX is your username)
6. Connect your phone to a USB port on your computer, your phone should prompt you to allow the connection to\from your computer. Allow the connection. Might be best to choose to "Always Allow"
7. Return to the command prompt and type in: adb devices You should see your device listed.
8. In the same command window, type in: adb reboot bootloader This will auto reboot your device into the "Download" mode.
9. Open and run Odin, add the corresponding tar files to the respective area's, in the "options tab" in Odin, make sure that only "Auto Reboot" and "F. Reset Time" is checked.
Click "Start" and the process will take a few minutes to complete.
Allow the device a few minutes to auto reboot and start up.
After you get through all the post boot setup screens, open a phone dial pad and type in, *#2263#. then make sure that all LTE bands are enabled.
Here you can find the SM-G960U T-Mobile Files: https://www.droiddosh.com/2018/04/samsung-galaxy-s9-sm-g960u-firmware-tmobile-usa-G960USQU1ARBG.html

Switching from U -> U1 -> U
B"H
Ok, thank you.
1. So stock G960U (Original Carrier) -> Flash to U1 -
2. Then, Go from G960U1 -> Stock G960U (Any Carrier)
Few questions:
1. Which CSC file are you using to flash -- CSC_HOME?
2. In moving from U1 -> U, do you need the final carrier SIM inside the phone?
I've tried this with a Verizon phone I'd like to convert to XFinity (CCT). I flashed the G960U VZW to G960U1 XXA. That worked fine. Then I flashed the G960U CCT rom, and the phone just boots up Verizon. When I check the CSC, it says "VZW/VZW/VZW", even though I flashed the CCT rom.
I don't have an XFinity sim card, so perhap that is the problem.
Any help would be great.

dovid said:
B"H
Ok, thank you.
1. So stock G960U (Original Carrier) -> Flash to U1 -
2. Then, Go from G960U1 -> Stock G960U (Any Carrier)
Few questions:
1. Which CSC file are you using to flash -- CSC_HOME?
2. In moving from U1 -> U, do you need the final carrier SIM inside the phone?
I've tried this with a Verizon phone I'd like to convert to XFinity (CCT). I flashed the G960U VZW to G960U1 XXA. That worked fine. Then I flashed the G960U CCT rom, and the phone just boots up Verizon. When I check the CSC, it says "VZW/VZW/VZW", even though I flashed the CCT rom.
I don't have an XFinity sim card, so perhap that is the problem.
Any help would be great.
Click to expand...
Click to collapse
You most likely will need a Xfinity Sim Card. I was able to convert my Xfinity Mobile S9 to AT&T by going to U1 firmware then inserting my AT&T sim card then flashing the AT&T U firmware.

ajairola said:
You most likely will need a Xfinity Sim Card. I was able to convert my Xfinity Mobile S9 to AT&T by going to U1 firmware then inserting my AT&T sim card then flashing the AT&T U firmware.
Click to expand...
Click to collapse
Where is the at&t u firmware? Currently on the unlocked firmware. Thanks

Savebig said:
Where is the at&t u firmware? Currently on the unlocked firmware. Thanks
Click to expand...
Click to collapse
Go to this thread (thanks @iBowToAndroid) and then look in the RB7 folder on Android File host.

Question
Does anyone know if you have to have the phone unlocked before changing over carriers? for example if i had a Galaxy S9 from Sprint and wanted to change the firmware to T-Mobile would it work or would it still be locked to Sprint? Thanks for your Help!

B AdamsHxC said:
Does anyone know if you have to have the phone unlocked before changing over carriers? for example if i had a Galaxy S9 from Sprint and wanted to change the firmware to T-Mobile would it work or would it still be locked to Sprint? Thanks for your Help!
Click to expand...
Click to collapse
Have the same question, but on my Verizon Note 8...

PieceofSlice said:
Have the same question, but on my Verizon Note 8...
Click to expand...
Click to collapse
I would check if your phone is already unlocked, Most Verizon phones come unlocked (unless you bought them from a Verizon Tent at Cosco or stores like that) Just put in another carriers sim card and check, if it is unlocked then you shouldnt have to flash anything, once you put in a different carrier sim it will tell you to restart your phone and once you do it will come up with the new carriers splash logo and apps

PieceofSlice said:
Have the same question, but on my Verizon Note 8...
Click to expand...
Click to collapse
In my experience all the carrier S9s are locked. You will need an unlock code from your carrier or an unlocking service.

Noob here: I’ve read that all US S9 models are the same in terms of hardware, is that true? Would that mean if I change the firmware from verizon to T-Mobile, it’ll be fully compatible?

Xamuyees said:
Noob here: I’ve read that all US S9 models are the same in terms of hardware, is that true? Would that mean if I change the firmware from verizon to T-Mobile, it’ll be fully compatible?
Click to expand...
Click to collapse
Yes! All 965U's, 965U1's, and 965W's are the exact same hardware, just different firmware.

For those of you that use TMO or U1 firmware on an unlocked ATT phone on TMO network, do you get a <Subject: NoSubject> before other people's texts in group texts? I've tried flashing U and U1 firmware several times as well as factory reset without being able to get rid of the subject line. Anyone have any insight or suggestions?

I was able to go from U1 to the att firmware. My question is why does samsung pass not work? I can see that the knox is not tripped and google play store is certified. Device status says official. Device is not rooted but Samsung pass thinks it is rooted. Why would this happen when all I did was install the carrier bundle?

(Newbie) doing what jrockz3000 did would allow root to be possible?

MFmvrdoc said:
(Newbie) doing what jrockz3000 did would allow root to be possible?
Click to expand...
Click to collapse
Unfortunately not. All North American S9s are not able to be rooted at this point.

ajairola said:
Unfortunately not. All North American S9s are not able to be rooted at this point.
Click to expand...
Click to collapse
Thank you man~

Odin link down
jrockz3000 said:
I've completed this task tonight thanks to some great help from a user that stepped me through it on a TMO Forum.
First an FYI, I first was able to flash my AT&T S9 version from SM-960U to a Stock SM-960U1. It worked great. After that, I was able to flash the TMO Rom and it's also working perfect. I'm not sure if it's required or not to flash the phone to a U1 first or if the TMO Rom can just be flashed. After I flashed the TMO firmware, I had no issues downloading and installing the latest TMO update. (My device is unlocked as well)
It's best to use Samsung switch first to backup your texts, pics, etc. first if you want to restore them to the device after completing the flash. The below instructions will start the phone up as if it was new out if the box.
Here is what I was provided with and the steps I followed.
To Flash the SM-G960U to a SM-G960U1
1. Allow\Enable USB Debugging in Developers settings.
2. Download the U1 Firmware here:
(this is the U1 from Samsung, it's compressed but once extracted it will be around 4GB's of data.)
3. Download the ADB tools: . Create a folder on your desktop and name it ADB (for easy reference)
4. Download Odin:
5. From windows, run command prompt, in the command prompt type the following: cd C:\Users\XXX\Desktop\ADB
(XXX is your username)
6. Connect your phone to a USB port on your computer, your phone should prompt you to allow the connection to\from your computer. Allow the connection. Might be best to choose to "Always Allow"
7. Return to the command prompt and type in: adb devices You should see your device listed.
8. In the same command window, type in: adb reboot bootloader This will auto reboot your device into the "Download" mode.
9. Open and run Odin, add the corresponding tar files to the respective area's, in the "options tab" in Odin, make sure that only "Auto Reboot" and "F. Reset Time" is checked.
Click "Start" and the process will take a few minutes to complete.
Allow the device a few minutes to auto reboot and start up.
After you get through all the post boot setup screens, open a phone dial pad and type in, *#2263#. then make sure that all LTE bands are enabled.
Here you can find the SM-G960U T-Mobile Files:]
Click to expand...
Click to collapse
Odin link down.

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?

At&t Firmware Conversion to Unlocked

So roughly following this thread - https://forum.xda-developers.com/galaxy-s20-fe/how-to/t-mobile-firmware-conversion-to-unlocked-t4172347
Thought I'd try it on my At&t branded device, and give a little walkthrough.
1. Make sure you have Samsung drivers installed https://www.samsung.com/us/business/support/owners/product/galaxy-s20-fe-5g-unlocked/
2. I had to use a patched version of Odin 3.14.1 linked here https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572
3. The firmware I went with https://samfw.com/firmware/SM-G781U1/ATT/G781U1UEU1ATIG
4. Unzip all files
5. Boot Samsung phone in Download Mode (hold Home + Power + Volume Down buttons / hold Volume Down + Bixby buttons then plug-in cable) or adb reboot download
6. Open Odin (dismiss any warnings at your own risk) add BL,AP,CP, and I used Home CSC (does not wipe user data) in the CSC slot (can use regular CSC if you want a full wipe)
7. Run, should auto reboot, and enjoy less At&t junk
Model number before was SM-G781U
Model number after is SM-G781U1/DS
Build number before was G781USQU1ATI9
Build number now is G781U1UEU1ATIG
Have not tested At&t wifi calling because I don't use it, but I've read that it doesn't work
Also OEM unlock is still not under dev options

Great [emoji106]. FYI, for people that wonder if firmware flashing will unlocked network carriers then no.
Sent from my SM-G781U1 using Tapatalk

I guess the question is, why flash unlocked model if no OEM Unlock is available and you lose features from the carrier?

tlxxxsracer said:
I guess the question is, why flash unlocked model if no OEM Unlock is available and you lose features from the carrier?
Click to expand...
Click to collapse
No At&t bloatware

tlxxxsracer said:
I guess the question is, why flash unlocked model if no OEM Unlock is available and you lose features from the carrier?
Click to expand...
Click to collapse
I always buy Samsung unlocked device, but since T-mobile offered a great discount I go with them. Since I have T-mobile unlocked my phone I go with unlocked firmware.
Sent from my SM-G781U1 using Tapatalk

In just got the T-Mo variant this morning. I went ahead and did a data transfer with Switch to maintain setup, from an A71 5G. Then converted the locked TMo from G781USQU1ATL2 to: G781U1UES1ATL3 (unlocked)

Will this wipe your data?

kettir said:
Will this wipe your data?
Click to expand...
Click to collapse
Not if you use Home CSC. Regular CSC will.

I tried your method it didn't work for me. Also tried to remove the OEM lock without any luck.
Do you have any suggestions? note that i'm living outside USA.

rmdan90 said:
I tried your method it didn't work for me. Also tried to remove the OEM lock without any luck.
Do you have any suggestions? note that i'm living outside USA.
Click to expand...
Click to collapse
i just managed to do it and im downloading the android 11 update RN
but no OEM unloking sadly
im also outside the USA too btw

Question AT&T G990U2 to T-Mobile or unbranded firmware help needed

I would appreciate if anyone can point me to the right direction. I have 21FE G990U2 from AT&T, It is unlocked by AT&T.
All I need is working T-Mobile firmware or Samsung (no carrier branding) to flash. I tried multiple versions of U, U1 and U3 firmwares (all matching my current Binary -4) but no success.
I just would like to get rid of ATT bloat. I know I can uninstall it via ADB but I rather have firmware clean of it.
Any suggestion please?
Thanks

So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link by clicking on "Download Samfw server" (G990U2OYN4EWC3, April 2023 update):
Download Galaxy S21 FE 5G SM-G990U2 (TMB) G990U2SQS4EWC3 in Samfw - Samsung firmware download
Galaxy S21 FE 5G SM-G990U2 (TMB - United States) G990U2SQS4EWC3 T(Android 13) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.

Shuhan44 said:
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link directly (G990U2OYN4EWC3, April 2023 update):
https://02-samsung.cloud/v2/IxJCDiMnLh8SLAo5IRtBAzwDMyMyCB4lFzssIDs2ByAzMUEgOzEUQDMQMCMBOyw/LiUzJjIXCDkuJC8/NDseIy8xIQYzOAIlPDAVHRIvMz81CAIkMwsuOB42FA00Nh4LNS8vFjIXLA0NFzE/PAMeOTMADTkDAC4mNBEaMCExQQEhJQUUHjFCMTs4BkIjCyI/Iws8MQEWCDAeCw0xCREHOTQbIyshAD4OIQAGLC44Hiw0ER4OMiUzLDIlDSs8AD4fJhsGOg8HCkA8AywnCRc+Di8LBxAzBy4RDxYpKTwkHjUeBylCJgceKTIXIUAJER4OMi8+AwMSMBsBAzY5LwNBJi8IMAQ4MTQUAQMgLyMsHjM7JDMHLzEjJDgAISk8PxQ9NTggQiYbLyUhJCEpMjsHJzw2KSceFy4QIzEvKw8WIAYhFh4JMjAeLDQsLCM0Gy45IzgGQiMDPB0jJCI/ARYFMCMiExM=
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Click to expand...
Click to collapse
You are correct - I need T-Mobile (or carrier free) so I can utilize full carrier settings.
Thanks for the link, however above link gives an error when opening the page.
Nevertheless I will look for TMB firmware with CSC: G990U2OYN4EWC3 and post an update here

Flashed that and still has AT&T boot logo and all the apps

h078 said:
Flashed that and still has AT&T boot logo and all the apps
Click to expand...
Click to collapse
Well, I am sure that you have flashed by a Factory reset (Flashed CSC, not Home CSC in ODIN). The boot logo can be changed by rooting your device, also bloatware apps can be deleted via ADB command without rooting.. but you already have mentioned that you prefer not to proceed with those processes. So I am out of suggestions, sorry.
Just for my knowledge, after flashing the TMB firmware, now your settings> About phone> software information> service provider software version: 2nd line shows as TMB/ TMB/ AT&T?
(Also corrected the download link in my previous comment anyway).

Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies

h078 said:
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
Click to expand...
Click to collapse
I do not get why the CSC can never be changed, even after flashing the complete firmware... must be an ATT thing!
Anyway, to change the csc only, there is another very quick & easy method. It takes only 2/3 minutes; no flash or factory reset is required. You have to download and install a small software "SamFW Tool" on your pc/laptop (may need to disable the antivirus during the download/install process). Once done, connect the phone and enable USB debugging mode. Open the software, under the ADB tab, click Change CSC, from the dropdown list select TMB and click Change. The phone will restart and CSC "Should" change to TMB/TMB/ATT.
Here is the download link for the software:
https://www.mediafire.com/file/upaiwadhmstm6js/SamFwToolSetup_v4.6.zip/file

That did the trick. I have T-Mobile CSC now
Thanks a lot

h078 said:
That did the trick. I have T-Mobile CSC now
Thanks a lot
Click to expand...
Click to collapse
Great!
But still, that's only one part of the final solution I think. Your target was to replace the complete firmware from ATT to TMB, right? Since the CSC is now changed to TMB, I think you can give it another try via ODIN to install the TMB firmware now (only if you want). I am not confident that it will work now, but still, one last try should not be much of a hassle.

I think that these multi CSC contain all US carrier customizations....When I changed it to TMB it shows TMB/TMB/ATT and loads bootlogo as well as TMobile apps... I guess it is similar as Blackberry used to be back in the days...Depending which carrier SIM used it loaded proper settings from the firmware...

I have flash my METROPCS G990U2 to G990U3,other sim card work fine,but t mobile sim card does not work ,can someone help me?I already change CSC to xxa,but still no internet,I do have sginal bar​