Got my new iPhone 5 that I ordered through someone else's account and went to the AT&T store to do the number shuffle. iPhone 5 -> my account my old iPhone 4S -> to the other person's account other person's 3GS -> his wife switch his no. and wife's no. (wife's no. had the unlimited data) Got a great guy at the AT&T store who understood the whole plan and implemented it without issue. Sweet!