I recently sold an iphone 3GS on iOS 5, and i May have activated the phone for them with my apple id.... So all of the sudden, all of my contacts are missing and I have someone else's contacts Instead... Every time I try to restore from a backup that has my contacts in it, it restores the phone without any of my contacts or information. Its as if its not really restoring from backup... the only thing that transfers are the apps... but then again, I feel like the apps might have never left the phone. I cannot get my old contacts and this is really frustrating. The first person to post a solution that helps me get my contacts back on my 4S, I will donate money into the paypal account that is posted. Thank you!