So now that I have preordered the iPhone 5 using my wife's upgrade, we plan on doing an upgrade swap by me giving her my 4S and I getting the 5. We will make the necessary swaps when it arrives next week in the mail. My question is, since I don't have upgrade eligibility until May 2013 and we are planning to do an upgrade swap, once we do that, will my upgrade eligibility go from May 2013 to like March 2014 since that's 18 months from today and what will happen to her upgrade eligibility, will she have my May 2013 eligibility? Thanks