Im on TMO and want a 520 NOT a 521. I plan on making 3D printed cases for them and got my wife a 520 with the plans to unlock it. So far I have paid TWO different unlock web pages, and BOTH have refunded my money saying that the IMEI number I gave them is not in the database, and cant be unlocked? Has anyone had any problems unlocking AT&T 520's?
Gibbage
Gibbage