O.k. so i've decided to buy a first gen iphone from ebay and use it with my already in use att plan. This plan is cheaper (No data), but i still plan to use it. 1) Now im guessing i would still have to unlock the phone because it isn't an "iphone sim" correct? 2) Also, the sim im planing to use has that att 3g sim. Will this still work even if im not going to use the data on the phone? 3) Lastly, if im going to have to unlock it, with pwnage or something, do i need the original sim the phone came with, or can i unlock it without it and just use my current sim after i unlock it? Sorry for the all the questons but any answers would be greatly appreciated.

Thanks