tomorrow i'll be selling my 8gb iphone(don't worry i'm getting another soon). The guy wants to give me his AT&T Tilt+cash for my iphone. but before i do i have some questions. BTW his tilt is modded with the HTC software and has that cool Touchflo Cube, kinda like the iphone but not exactly. 1.)correct me if i'm wrong but if we swap SIM cards both phones should work normally correct? So i would be using my Iphone SIM card in his tilt and he would use his Tilt SIM card in the iphone. They should be compatible. 2.) how do i restore everything back to factory settings? 3.)if we can not swap SIM cards how should we proceed with the transaction. Should i cancel my iphone service and activate the tilt. Because if i don't cancel the iphone contract will still be under my name, would this be considered an early termination? any advice or suggestions would be appreciated.