I'm needing to exchange my iPhone due to a faulty battery. I made a thread about it earlier btw. Anyway, I was one of those people who was really on the bubble about what color iPhone to get, so now I'd like to get a white one. Does anyone know if it's possible to exchange a black 16GB for a white 16Gb??? I heard it depends on who in the store you talk to, but any help or advice would be greatly appreciated.