Hi, I have an original unlocked iphone (2G). I recently moved to U.S & now want to use it with an AT&T sim card. I have bought a at&t sim with 2 year contract & a free phone along with it. Now i want to use this sim card with my unlocked iphone. Can anybody tell me if there is any specific process to do this. - I want to use the data plan - I want to be able to use the iphone just like a regular iphone bought in U.S with AT&T contract , i.e, would want to be able to sync with iphones, download the apps for the apple store etc. Is this possible. - I want to retain my contacts & messages. I dont mind losing the other settings.