Samsung S10 Unlocked phone with AT&T Firmware

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avireddy1

New member
Jul 16, 2013
4
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samsung galaxy S10 ATT firmware

Hello,

i am not sure about what was happening before. but after i installed the below firmware, i was able to get into AT&T stuff. i am able to get video calling, wifi calling, volte settings. i am happy now



Hi,

I saw you got success installing ATT firmware to get WIFI calling on, i troed to follow link for files. I saw multiple folders in there , SAT,SBA,SD3. Can you please tell me which one to use ?

Thanks,
avireddy1
 

avireddy1

New member
Jul 16, 2013
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Galaxy S10 unlocked ATT firmware question

Hi I recently got Galaxy S10 Unlocked phone on online. At first i didnt get ATT wifi calling options appeared in my phone. Later i followed same thread that has 973U ATT firmware links, and flashed using ODIN. I can see all ATT apps and ATT wifi calling option now but i cannot enable it. When i enable it i got a message saying we cannot turn on WIFI calling on this a device and error code EDS0008. I tried to call ATT folks, but they are saying WIFI calling and HD voice is not supported on this unlocked device. Somehow they are seeing 973U1 as model number, but i had 973U as model number. I tried changing sim to old iphone and I saw WIFI calling is working with IPHONE, but its just this phone I am seeing error. I am not sure what to do now. Did you see this issue ?

Can you give me exactly about the files you used and post steps to get att wifi calling ?
 

monkeyDroiid

Member
Nov 29, 2017
24
6
AT&T is a total prick when it comes down to activating these features. Either switch or get the AT&T version of the phone.

---------- Post added at 06:11 AM ---------- Previous post was at 06:08 AM ----------

Flashing the AT&T firmware does NOT work. The IMEI of your phone cannot be provisioned since it is not a branded AT&T phone.
 

avireddy1

New member
Jul 16, 2013
4
0
Today I got software update over the air and I was able to activate wifi calling. Wifi calling is working now.
 

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aramhitech

New member
Dec 25, 2019
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Dear Friends,
Looks like just flashing firmware does not help in getting wifi-calling, volte, etc. The phone I bought (Galaxy S10e SM-G970U) has ATT firmware, but mentioned services
are not available. I called AT&T, they told me the system checks the IMEI and figures out it's not a phone bought from ATT, so blocks
the services.

AM I stuck? What else can be done?

Thanks.
 

iBowToAndroid

Senior Member
Nov 9, 2010
5,695
1
1,802
Twin Cities MN
Dear Friends,
Looks like just flashing firmware does not help in getting wifi-calling, volte, etc. The phone I bought (Galaxy S10e SM-G970U) has ATT firmware, but mentioned services
are not available. I called AT&T, they told me the system checks the IMEI and figures out it's not a phone bought from ATT, so blocks
the services.

AM I stuck? What else can be done?

Thanks.
The one thing that has sometimes worked for other people is to flash U1 firmware, but with the AT&T (U) USERDATA file
 

aramhitech

New member
Dec 25, 2019
4
0
The one thing that has sometimes worked for other people is to flash U1 firmware, but with the AT&T (U) USERDATA file

That's what I thought too, but AT&T checks the IMEI then provisions the service. That is how they explained in customer service.
The phone has all the ATT bloatware but IMEI is non ATT.

Any ideas? Maybe hack the IMEI? Is that possible?

Thanks,
Aram
 

iBowToAndroid

Senior Member
Nov 9, 2010
5,695
1
1,802
Twin Cities MN
That's what I thought too, but AT&T checks the IMEI then provisions the service. That is how they explained in customer service.
The phone has all the ATT bloatware but IMEI is non ATT.

Any ideas? Maybe hack the IMEI? Is that possible?

Thanks,
Aram
I have no idea what "hack the IMEI" means. I suggested the above tip because some people reported it working. Rather than giving reasons as to why you think it won't work, maybe you should just try it and see if it does...?
 

aramhitech

New member
Dec 25, 2019
4
0
I have no idea what "hack the IMEI" means. I suggested the above tip because some people reported it working. Rather than giving reasons as to why you think it won't work, maybe you should just try it and see if it does...?

I think I'm missing something here. The firmware is already "U". Do you suggest to re-flash it?

Thanks
 

aramhitech

New member
Dec 25, 2019
4
0
Dear friends,
When I try to flash from "U1" to "U" version (ATT) formy Samsung 10 phone, the process stuck at the "SW REV. CHECK FAIL" showing at the phone.
I read some forums and looks like it's bootloader version mismatch. The one I have on the phone is latest, but the one I downloaded from this thread is
older. BTW, Android version is 10 in my phone now.
Does anyone have the latest firmware, or know how to bypass this issue, so I can finally switch to AT&T

Thanks.
 
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  • 1
    Hello.

    I have purchased Samsung Galaxy S10 unlocked phone directly from Samsung. I am using At&T carrier network on this phone. As this is the first time, i am purchasing unlocked phone, i was not aware that wifi calling, VOLTE and video calling wont work on unlocked phone ( with AT&T carrier)
    There is very poor signal near my home. I really need Wiif calling and VolTE option.
    is there a way that i can install At&T firmware on my phone ?

    I have few questions after i install the firmware

    1. After installing At&T firmware, will other sims work on my phone in future ?
    2. I personally paid for the device, but sim is on business account. will this have any impact if i install firmware ?
    3. after install AT&T firmware, will i be able to do any future updates without any issues ?
    4. will installing this firmware, void my phone warranty ?
    5. what is the difference between unlocked and locked phone ( apart from i can use with another careers )

    Since this is first time, i have these questions
    1
    NOTICE (PLEASE READ):

    Credit to @iBowToAndroid for the FIRMWARE.

    3.) Perform a 'Factory Data Reset'
    (Settings > General Management > Reset > Factory Data Reset)

    4.) After the 'Factory Data Reset' is fully complete, your Device will restart. This is expected behavior.

    5.) After the restart, you will be greeted with a 'Let's Go!' page and a prompt to select a language.

    6.) Power off the Device.

    7.) With the Device powered off, hold down the BIXBY BUTTON and the VOLUME DOWN KEY at the same time.

    8.) While still holding down the BIXBY BUTTON and the VOLUME DOWN KEY, press and hold the POWER BUTTON.

    9.) When done correctly, you will be greeted with a teal colored screen that reads the following:

    'Warning

    A custom OS can cause critical problems in phone and installed applications.'

    10.) Press the VOLUME UP KEY to enter 'Download Mode'.
    Or... You can just manually boot to recovery, do the wipe there, and then choose Reboot Bootloader to go to Download Mode. Much faster :)

    Same steps but you'll use HOME_CSC instead of CSC_OMC.
    Incorrect.

    You ALWAYS use *non HOME CSC* when switching between U1 and U firmwares
    1
    @iBowToAndroid

    I was under the impression if we go from U1 to U, we use CSC_OMC and HOME_CSC if we go back to U1.
    Nope. HOME leaves data and settings intact, and the other one performs a wipe. A wipe is needed when swapping firmwares since the partition table is slightly different, and even if they were the same, you'd have crashes and glitches and errors galore until you wiped.

    If you merely want to Odin flash a new version of the same firmware instead of doing it OTA, then you can get away with using HOME CSC
    1
    Thanks for clarifying. You provided some insight on a prior thread but this is much more in-depth.

    So, in this Users case, was a full flash of U software needed? Or could we have simply flashed the appropriate Userdata and CSC based on his Carrier of choice (AT&T)?
    1. If you want carrier bloat and/or specific features, then you need U firmware. You can't get any of that with U1

    2. The CSC files are the exact same for any firmwares with the same build - no matter what carrier/region they're from. The only difference is the USERDATA file - that's what contains the bloat.

    3. You can't use USERDATA files when flashing U1
    1
    Let's try with a different Odin.

    I've attached a newer patched version of Odin.
    (Courtesy of this thread: https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572)
    It's not newer. It's just been patched, to remove the incompatibilities that would normally appear. This is the correct version of Odin to use - it can flash pretty much anything, for any model