Hi I paid in full for a iPhone 6s + AT&T on the Apple Store to ship. I did not know about the iPhone upgrade program at the time of purchase. Do you think it would be possible to return the iPhone at the Apple Store and buy the same iPhone I returned back on the iPhone upgrade plan? I am not sure the AT&T full price iPhone is the same as the unlocked that is offered with the iPhone upgrade program?
Yes you can do that. By the iPhone upgrade program total cost is more than At&t full price because it includes the apple care+ as well.