AtT NOte 2 unlocked, now using Tmobile, Can't upgrade firmware

jinjin12

Well-known member
Nov 28, 2012
169
0
16
Visit site
MY sister called ATt to unlock her phone when she went abroad, they did. Now she no longer has ATT and is with tmobile. Using the Tmobile sim card, she can't seem to upgrade her OS using the firmware update option in settings. How can she go about upgrading? she currently has android 4.1.2 with the NOte 2?

also if i flash aokp on her phone, but she don't like it, then flash back the original 4.1.2 firmware, would i lose the unlock that ATT did for her and she can't use Tmobile anymore?
 

Forum statistics

Threads
942,818
Messages
6,916,003
Members
3,158,666
Latest member
hiviwin68