@Rudegar - Thanks for your reply but i'm not dumb, i know what IMEI is & means. My question is this, how come the UE Model 1530 iphone 5s imei starts with 35xxxxxxxxxxxx and the AT&T Model A1533 has the IMEI starting 01388xxxxxxxxxx. It's because of the region or what? From what i know until now all the iPhones had the IMEI starting 01xxxxxxxxxxxxx. I just wanned to ask befoare i buy one (don't wanned to buy a fake one).