Hi guys,just to know,I wrote to at&t: Good day, I would like to get in touch with you directly in order to solve the following problem: Purchase of no. 2 iPhone 4 S color white 16GB AT&T at the Applestore located in California,last November 8 for $700,92 each, tax included. Both devices have been started with a different carrier than AT&T since the very first run and then used for 4 day in the States, 1 in Germany and 1 in Italy with no problem at all. Last Monday I tried the following action from Italy: SETTINGS>GENERAL>RESET>ERASE ALL CONTENT AND SETTINGS. I then switched on the device and this message popped up on the screen: The sim card you are using is not valid (translation from Italian). I got in touch with the Apple care USA-Apple care Italy-Apple Store where we recently bought the two unlocked devices and I got the same reply from everybody saying that I should provide IMEI and ICCID codes and ask AT&T to unlock both cellular phones because the devices had been bought at full cost and they are therefore UNLOCKED devices. The phone came with an AT&T card that I have never used. Together with the phones, we also purchased two APPLECARE FOR IPHONE contracts for 99$ each. A contact would be appreciated in order to attempt a solution, whether possible. What I would like to receive is an AT&T valid reply to my inquire. Best Regards.