I doubt I will be able to pull this off but I'm thinking about selling my iphone4. I have a black 32gb and I want to trade for a white iphone 4 on my local craigslist. If all works out am I right to assume that if everything works out me and seller can just swap sim cards and that's all. I mean I no I obviously have to wipe all my data off of the phone but is there anything else I would have to do?