I bought an iPhone from a friend of a friend. It is like new in box. The guy just bought it and didn't care for it so he canceled the service. I got the phone activated through At&T and everything works fine, but when I go to the Apps store and try to download something his old User ID pops up and asks for a password. I put all my info into iTunes on my PC and synched up but it is still there. Can anyone tell me how to get my iTunes user Id set on my phone?