[Q] Sim Network Unlock

[Mendified]

Hello as this is my first problem with a phone/phone company, I'm confused. I am a long time T-Mobile customer. But my son gave me an upgrade phone cause I am apparently severely outdated. However it is an AT&T phone. A Samsung Galaxy S2 SGH-i777. He moved and now goes with Verizon. So I put the phone in my name by buying a $10 prepaid deal. However its now been over a year & 8 requests and AT&T continues to deny me the unlock code. The phone was never under a contract , it was purchased outright and was a gift a few years back from his father. Now my ancient phone ha taken a crap and I cant afford to buy another one. I have looked into several sites and became a member here thinking I was more edumacted :cyclops: then I am. I just really want to unlock the damn thing. Please help......This is what Ive done thus far.

1.) Updated to 4.1.2
2.) Downloaded and Installed Framaroot getting the SuperSU
3.) Downloaded CSC Select & SGS unlock tool.
Still no unlock code. Maybe I messed up already ..... idk? 2 months ago I was laid off, my savings is damn near completely dry and I need help.( In more ways then 1....bahaha)!! I would like to remove anything & everything regarding AT&T from this device and run Google or WHATEVER. Is that possible?? I Thank You ahead for any time, advice and help anyone can give. Happy holidays and Namast'e :good:

 

[cyril279]

Unlocking is the easy part:
a) Get the relevant information from your son, and use this AT&T website.

OR

b) I used Galaxsim unlock, and have used my i777 on other carriers (not t-mobile), and overseas.

Using the i777 on TMobile? I'm not sure that will work very well.
-The i777 GSM frequencies [850, 900, 1800, 1900] will not communicate beyond 2g on t-mobile network.
EDIT: Apparently T-mobile has refarmed a lot of its 3g+ services to the 1900 frequency, which will allow the i777 to communicate at full speed on t-mobile service. *assuming the relevant refarming happened in your area.

You want to use a de-branded, slimmed down version of the firmware? No problem.
If you like the touchwiz interface, look at cooked or shostock.

If you would like to run an AOSP flavored firmware, then there are several excellent choices in the development forum.

Happy flashing,
-Cyril

Hello as this is my first problem with a phone/phone company, I'm confused. I am a long time T-Mobile customer. But my son gave me an upgrade phone cause I am apparently severely outdated. However it is an AT&T phone. A Samsung Galaxy S2 SGH-i777. He moved and now goes with Verizon. So I put the phone in my name by buying a $10 prepaid deal. However its now been over a year & 8 requests and AT&T continues to deny me the unlock code. The phone was never under a contract , it was purchased outright and was a gift a few years back from his father. Now my ancient phone ha taken a crap and I cant afford to buy another one. I have looked into several sites and became a member here thinking I was more edumacted :cyclops: then I am. I just really want to unlock the damn thing. Please help......This is what Ive done thus far.

1.) Updated to 4.1.2
2.) Downloaded and Installed Framaroot getting the SuperSU
3.) Downloaded CSC Select & SGS unlock tool.
Still no unlock code. Maybe I messed up already ..... idk? 2 months ago I was laid off, my savings is damn near completely dry and I need help.( In more ways then 1....bahaha)!! I would like to remove anything & everything regarding AT&T from this device and run Google or WHATEVER. Is that possible?? I Thank You ahead for any time, advice and help anyone can give. Happy holidays and Namast'e :good: