Currently have a white 16 GB iPhone 5 that I paid $199 for using upgrade (purchased on 10/10/12). Can I order a black iPhone 5 tonight for $649 using reservation, then go into the apple store tomorrow, return my current iPhone and use that money to buy the black one that i reserve for $199. Essentially just returning the white one and using that money to buy the black one. Will apple allow this?? I searched the forum but didn't find this question.