5,597,762 Members 36,328 Now Online
XDA Developers Android and Mobile Development Forum

[Q] Unlock AT&T Galaxy S3

Tip us?
 
ledthezeppelin
Old
#1  
Junior Member - OP
Thanks Meter 0
Posts: 5
Join Date: Mar 2011
Default [Q] Unlock AT&T Galaxy S3

Hey guys,
I have an ATT Galaxy S3 but I recently switched to TMobile. I don't have the sim card yet, hopefully get it tomorrow, but my ATT sim card has been deactivated. Since I need to unlock my phone to use Tmobile, I was looking at some forums and I could do it using the dialpad and pressing *#197328640# and following some steps. But I read that this was possible in only a 4.1.1 ROM?

Right now I have MIUI v5. Do I have to downgrade in order to use the *#197328640# code and unlock?

Cheers!
 
audit13
Old
#2  
audit13's Avatar
Senior Member
Thanks Meter 268
Posts: 1,673
Join Date: Jun 2012
You must be running stock 4.1.1 in order to have the necessary menu options.
 
theramsey3
Old
#3  
theramsey3's Avatar
Senior Member
Thanks Meter 125
Posts: 331
Join Date: Jun 2012
Have you ever been on the 4.3 OTA? Or the 4.3 bootloader? If you haven't been on them you can use Odin to go back to 4.1.1 however if you have the 4.3 bootloaders and you try you will certainly have a hard bricked phone that might be recoverable via SD card or you will need a jtag.

Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


XDA PORTAL POSTS

Polish Your Custom Themes with Theme Debugger

Creating a custom Android theme from scratch can be quite the laborious task. In addition to … more

Clean Up Your Logcat Code with Lib Cleaner

Some of you may think that writing code is the hardest part of development. It’s not, as the … more

Tweak Your Xperia Device’s Camera App Yourself

We’ve come to expect nearly perfect cameraperformancein our modern day … more