Here's my situation.. my sister's iphone4 got stolen Friday at a bar, quite a timing considering iphone4s came out the same day. So she went to ATT to get a new phone, and ATT renewed her contract, BUT gave her an iphone4 because they were "Out of stock" on iphone4s. What should she do to swap it with a iphone4s? go to the apple store? ATT store? call iphone customer service? What do you think?