So here is the situation. I went to get the iPhone 3G today but they would not let me get it for $199 before my contract ends even though it ends in 2 months. I really don't feel like waiting so I thought of something. My little sisters 2 year contract with AT&T is already up but she is not interested in a new phone so I figured I could purchase the iPhone for $199 via a 2 year contract under her phone number and then possibly switch the sim cards or something so I'd have my number... or deactivate the iphone under her account then take it to AT&T and activate it under my account.. I don't know. Would I be able to do this some how cause I really don't feel like waiting another 2 months. help .