So Im thinking about buying a Gen 1 iPhone off a co-worker and replacing my 8GB Touch. Ive got a few questions though... First is there anything that needs to be done when I swap the SIM cards or will this be a seamless transfer. We both have AT&T and his phone is not unlocked or jailbroken. Second I currently dont have a data plan associated with my AT&T set up. I will be getting one if I buy the iPhone but probably wont have it set up for a day or two. Should I be worried about massive data charges? Third, he has some applications he's bought already for 2.0. I have some from my 8GB touch for 2.0. Is there a way to mix them, will his override mine in my iTunes library, or will mine override his once I do the initial sync? Thanks for all your help!