0
votes
0answers
72 views

Will upgrading a SIM-unlocked device re-lock it?

I have a Samsung Galaxy S3 T999. When I got it, it was locked to T-Mobile. I needed to unlock it, as I am not in America. I wanted to know if I perform an upgrade to Android 4.4.2, will my phone be ...
0
votes
0answers
85 views

Where in the firmware does SIM lock checking occur?

What part of the firmware controls the SIM "lock" on Samsung Galaxy S III SGH-I747 (AT&T)? Are there any mods for that layer of firmware?
1
vote
0answers
1k views

How to unlock Samsung Galaxy S3 SCH-R530?

Can anyone tell me if the Samsung Galaxy S3 LTE model SCH-R530 can use any other non-contract carriers besides U.S. Cellular? I have searched, and I am getting frustrated with trying to find a way to ...
0
votes
1answer
332 views

Samsung Galaxy: Unlock gone haywire

I applied the procedure to unlock a Samsung Galaxy S3 on a Samsung Galaxy Express I437. It went through smoothly, and but the phone was not unlocked. Instead, it gives me the error message "Phone ...
1
vote
1answer
699 views

Determing SIM/network/carrier lock status in software

Is there a way to determine if a Galaxy S3 (i747, running 4.1 JB, stock ROM, but with root) is currently carrier locked in software (i.e. without needing to obtain and insert a different network's ...
1
vote
2answers
24k views

How can you find which carrier a Samsung Galaxy S3 (GT-I9300) is locked to?

I bought a S3 and it came locked to an unknown carrier. All the unlock services require the information of which carrier the phone is locked to give me an unlock code. So, how can I find that out?