Ok all I have a question: I am wanting to order a 4S, using my moms upgrade, get the phone and then give her my iPhone 4. She is currently using a 3GS. How does the whole switching of the numbers and stuff work? I'm in London until early November, but I want to be able to get the phone from home in the 3 days I am back before going back to school for winter term. If I have her order the 4S through the apple site, will she just be able to use her 3GS until I get home? Like ordering the phone won't affect her having to swap numbers to a new microSIM or anything? or does it automatically come pre-loaded with your new number since she will be ordering it using her line? Any answers would be helpful!