Here is my situation. I have 4 lines with AT&T. I usually upgrade when the new iPhone is released and pass my device down to one of my family members. My line is currently on the AT&T NEXT plan (upgraded to iPhone 7 last September). The other 3 lines are all upgrade eligible. This is my first time with the NEXT plan, so please bear with me. What is the best/smoothest option to set myself up for the next iPhone? Payoff device before the new iPhone is released so my line is upgrade eligible? I prefer to upgrade via the Apple app, not through AT&T. I did a "dummy" iPhone 7 upgrade on the Apple app and the only option is contract free pricing. How long does it take for Apple's system to pick up that device was paid in full at AT&T?