Sup guys, Well I bought a iPhone 3g on eBay that is factory sealed. If I wanted to use it for everything else BESIDES having the phone service do I still have to activate it? Since the phone is factory sealed, the auction said that to unlock it go via iTunes. Or in order to bypass the Activation via iTunes, can I use another AT&T simcard that was ALREADY in another iPhone and place it in the new iPhone? Thanks.