After getting confirmation from site IMEIUnlockPro, we decided to write this article and give you instructions on how to unlock your iPhone with the operator AT&T, and then you can put any SIM in your iPhone 4 or iPhone 5. With this procedure you will be able to unlock phone without having to jailbreak and install Hardware like Gevey SIM or UltraSn0w download. But let's see how you can Unlock your iPhone permanent for all carrier via Factory Unlock site.
How to use this Factory Unlock imei service - AT&T
This service is very easily to be used, only to make is to know your imei code and to send your personal info from IMEI Unlock Pro site. This site your iPhone will be unlock only for 1-24h. This is very fast service and the price is 29$. This is very good price, is not expensive. To view your imei code please click in your keyboard *#06# and Call. Yor code will be shoy on display. click in this link to Unlock iPhone 4 at&t or iPhone 5.
The only thing left to do now is wait, you will receive an email once your unlock code, the only way the unlock process will be successfully completed. The process works, everything has been confirmed by IMEIUnlockPro Dev Team, who kindly sent us e-mail confirmation received from AT&T of the unlocking process.
So if you have a foreign iPhone AT&T and you want to use it with any SIM card, you just need to follow the procedure described above, of course, let us know the outcome of the request.
This Factory Unlock method is permanent for all Carrier in the world.