Why does my Galaxy S6 (unlocked AT&T using T-Mobile as carrier) freeze and reboot?

[AC Question]

I have a 3 month old factory unlocked AT&T S6, which about a week ago started freezing and/or rebooting itself every minute or two. I've tried a ton of the suggestions in the forums (wiping partition, factory reset), HOWEVER my phone reboots or freezes so quickly that it never allows those things to happen when I click them.

This started happening in the middle of the night while connected to my WIFI at home, so my current thought is that the phone tried to do a software update and is now messed up because it tried to install a T-Mobile update on an AT&T phone (or vice versa). I don't know if that would be the cause, so I am hoping someone can help shed some light on this issue.

If you want any more info I'd be happy to provide it.

 

[lucianus_luciferus]

have you tried THIS ?

 

[IAmSixNine]

The software update is dependent on the model of the device.
So its doubtful an ATT phone would try to download TMO phone software.

 

[jeffarey]

luclanus: I have tried that a few times and the phone froze before I could get to the recovery mode menu each time. The furthest I got was to select wipe partition cache and it said "Formatting cache..." So I let it sit for 5 hours until I realized it had frozen again. Same thing happened with factory resetting... while it is in the midst of resetting the device to factory settings, it reboots and starts over. It's a never-ending loop.

PS i am the OP

 

[jeffarey]

IAmSixNine: Since it's dependent on the model, wouldn't the T-Mobile software update encounter a problem when trying to run on an AT&T device (even if it is unlocked)?

 

[IAmSixNine]

Unlocking the device only affects sim card / network access. The device model number defines what it is. Its still an ATT phone above all. The phone would not try to run a TMO update since its an ATT phone.