OK, so I have a buyer for my iPhone 4, my neighbor. She is going to pay me 400 for my iPhone 4, which is fair considering there's lots of scratches on the back and a small one on the front. So the question is, when I get the iPhone 5, will I be able to transfter my current micro sim into my iPhone, or will I need to get a new micro sim? Also part of the deal is I set it up for her. So how would I go about transferring her number onto my iPhone? She is with 02 also if that makes it easier. Any help?