Can I Odin flash my unlocked galaxy s8 phone to make it work on ATT again?

[Android Central Question]

Hi - I'm new to flashing phones, etc. I have a Galaxy s8 unlocked version that I bought from Amazon (SM-950U1). It stopped working after ATT shut down their 3G.

1. Can I flash the SM-950U software to my SM-950U1 phone and get my phone to work again? If so, how do i find the exact software that I need. (I think there are many SM-950U software versions depending on your region, etc). Is there an ATT specific SM-950U software version that I need?
2. Do I need to do change my IMEI number also (I don't even know if that's possible)
3. Will ATT be able to figure out that I flashed a different software, and then shut down the phone again?

Please help. I am very confused

 

[mustang7757]

The s8 should work its 4g capable going from unlocked to carrier firmware with odin i dont see would make a difference , i can help with that if you choose

I'll leave a Link to register so you can communicate here, As a guest account you can only post questions but can't reply
https://forums.androidcentral.com/showthread.php?t=409154

 

[smvim]

Have you contacted AT&T and just requested a new SIM card from them?

If they're telling you that your current SIM card is still valid, try creating a new APN entry using AT&T's recommended settings:
https://forums.androidcentral.com/e...rt/article/wireless/KM1062162/&token=82p6qqro

 

[Laura Knotek]

According to their whitelist only the AT&T branded S8 is accepted on their network, not the unlocked. Newer devices from the S line that are unlocked are permitted.
https://forums.androidcentral.com/e...ces-Working-on-ATT-Network.pdf&token=lMljhSq8

 

[Rajan Amin]

The issue is that my sm-950U1 is unlocked/unbranded and not an ATT phone. So ATT wont support it. But I have heard that I Can flash the SM-950U firmware and then it would work. Problem is there are lots and lots of SM-950U fimware versions. Can someone help me find the specific SM-950U firmware for what getting my unlocked non branded phone to work on ATT network?

 

[mustang7757]

The issue is that my sm-950U1 is unlocked/unbranded and not an ATT phone. So ATT wont support it. But I have heard that I Can flash the SM-950U firmware and then it would work. Problem is there are lots and lots of SM-950U fimware versions. Can someone help me find the specific SM-950U firmware for what getting my unlocked non branded phone to work on ATT network?

Welcome to AC!
Get the latest Odin patch B (prince comsey)
From XDA Forum, also from same source download Frija this will allow u to download firmware to your pc , back up your device as it will factory reset your device

 

[Rajan Amin]

Welcome to AC!
Get the latest Odin patch B (prince comsey)
From XDA Forum, also from same source download Frija this will allow u to download firmware to your pc , back up your device as it will factory reset your device

Appreciate the help but Im having trouble finding the firmware from XDA. Would you be able to send me a link ?

 

[mustang7757]

Appreciate the help but Im having trouble finding the firmware from XDA. Would you be able to send me a link ?

https://forum.xda-developers.com/t/tool-frija-samsung-firmware-downloader-checker.3910594/

Once download that with odin extract them both then open frija and will put model number with u at the end not U1 and csc TMB
Then press download so it can go to your pc files to extract and put in ODin

 

[Sweetleaf76]

Hey did this work for you?? I have the exact same problem with my unlocked S8 on ATT

 

[mustang7757]

Hey did this work for you?? I have the exact same problem with my unlocked S8 on ATT

Welcome to AC!

Att firmware are hard to get so flash T-Mobile

 

[Sweetleaf76]

Welcome to AC!

Att firmware are hard to get so flash T-Mobile

No I'm sorry I meant did flashing the ATT firmware on the unlocked device work??

 

[mustang7757]

No I'm sorry I meant did flashing the ATT firmware on the unlocked device work??

Yes you can flash both ways very easy

 

[MNMobileGuy]

No I'm sorry I meant did flashing the ATT firmware on the unlocked device work??

No, flashing firmware will not magically make AT&T accept the device. Compatibility is determined by the IMEI, not by the firmware that's on the device. So now they will only accept AT&T S8 IMEIs, not G950U1 IMEIs

 

[mustang7757]

No, flashing firmware will not magically make AT&T accept the device. Compatibility is determined by the IMEI, not by the firmware that's on the device. So now they will only accept AT&T S8 IMEIs, not G950U1 IMEIs

If has Att as it known to have problems updating they can flash tmb firmware as Att is not easy to get and flash whenever the new update comes out sometime carrier not on same bootloader," U" and" U1" firmware the IMEI number is always the same and if they went to U1 firmware they dint have to worry about no updates as unlocked versions stay same firmware regardless carrier unlike carrier version.

 

[MNMobileGuy]

If has Att as it known to have problems updating they can flash tmb firmware as Att is not easy to get and flash whenever the new update comes out sometime carrier not on same bootloader," U" and" U1" firmware the IMEI number is always the same and if they went to U1 firmware they dint have to worry about no updates as unlocked versions stay same firmware regardless carrier unlike carrier version.

The problem is not about firmware updates.

The problem is AT&T not supporting the device on their network anymore, as it doesn't "qualify" per their VoLTE rules

 

[mustang7757]

The problem is not about firmware updates.

The problem is AT&T not supporting the device on their network anymore, as it doesn't "qualify" per their VoLTE rules

Ahh your referring to network my bad

 

[mustang7757]

That being said att on my unlocked versions never had issues