This morning when I found out that the white iPhones are being delayed even further, I have finally decided to go to the dark side and buy the black iPhone. I will most probably be selling the black iPhone to buy the white when it's released. 1. Will the Sim Card from the black iPhone work with the white one with no problems? 2. When selling the black iPhone, will it still be unlocked- using a sim won't lock it any way will it?