T mobile phone with At&t firmware

[Hassler Osorto]

Hi i bought my Samsung Galaxy S3 used in the back says T-Mobile but my phone has the custom apps from the carrier and they are from AT&T so i was wondering if thats the reason that i cant update my phone to android 4.3 or 4.4? (my samsung is currently with Android Jelly Bean 4.1.2). I found like the file to make the manually update installing it from the sd card on Recovery Mode but i was wondering what would happend if i install it? Oh and someone could tell what someone did to the phone(from t-mobile) so that it has an at&t firmware?

Posted via Android Central App

Posted via Android Central App

 

[Golfdriver97]

The phone was probably unlocked to use on TMobile. Since the updates are pushed over the air and each carriers looks for certain flags the phone has, this is why you aren't and probably won't get the update.