First post here, so.... "Hi!" I've searched (really, I have) but can't find an answer. I currently have an iPhone 3G that I use with an AT&T pre-paid plan. My father has a contract plan and he's eligible for an upgrade. He's older so he doesn't really care about a new phone. I'd like to do an upgrade swap using his upgrade but then use the iPhone 4 on my AT&T pre-paid plan while he continues to use his existing phone. I know this should be possible, but I can foresee some problems. 1.) Will the AT&T store or phone rep just do the upgrade swap for me as if I had a regular contract plan or will they refuse because the line it's swapping to is pre-paid? 2.) If they balk, can I order online, activate it on my dad's line and then just pop my current sim in there after cutting it down to micro-sim size? 3.) If I do #2, what happens to my dad's existing sim? If it gets deactivated can I get it reactivated or replaced so he can use his line on his old phone again? If so, can I cancel the data plan on his line that I'd be forced to buy when ordering the iPhone 4? Thanks for helping!