Hello folks, I was hoping someone here knowledge here can help answer a question and potentially give some advice. I noticed the recent deal at ATT about buy one get one free iPhone. I'm planning to buy a 64GB iPhone 6S+ and use the $650 credit to get a second one. My questions are as follows: I have an iPhone 5 in really good condition which apparently will net me $85 at the apple store after a buyback. I also have a $75 gift card from apple from before. Is there any way I can use these gift cards as part of the ATT promotion? That is to say, use them to "pay off" some portion of the phone. If not, how would you recommend I optimally use the ATT deal and the gift cards I have? Thanks so much folks, and I wish all of you very happy holidays!