Solve activation status after unlocking USA AT&T iPhone

If you did unlock USA AT&T iPhone, but the appearance of messages «Your request couldn't be processed» does not give you activate a new sim-free-status when connected to iTunes, we propose to use the service -
Solution - Your request couldn't be processed
The service allows you to activate the status resulting from any model USA AT&T iPhone.
Before ordering strongly recommend booking service to check IMEI iPhone operator and SIM-LOCK status and learn the general information about official Full unlock Apple iPhone by IMEI, instruction.
ME298LL/A iphone5s,Gol,16GB
Designed by Apple in California Assembied in China other items as marked thereon Model A1533 (1P)part No.ME298LL/A
(s)Serial NO.C39M51M4FFDQ
IMEI/MEID 013991000387840