I signed up for AT&T Next last year with the iPhone 6s Plus. When upgrading this year, I paid my last payment before preorder day to make sure I was upgrade eligible. However, I have a few questions regarding the procedure now that my I'm waiting for my new phone to arrive: 1) How long do I have to return the old phone? Does the time start from when I preordered or when I actually receive my new phone? 2) I did notice when I upgraded via the Apple Store app that it showed my old phone for the trade-in, but I haven't gotten a shipping label or anything like that. Does that come with my new phone, or do I have to go to an AT&T store to get one? 3) Since I made my 12th payment ahead of time, what happens with the payment plan? Will I have to make a 13th payment on the old plan before my new phone arrives, or do I start paying the new payment plan even before it arrives and I activate it? Thanks for the help!