so last year right around this time I got a new two year contract for an iPhone 6S+. I want to get the new iPhone 7. Can I bring my phone to apple, and trade the phone in, Receive a credit on the iPhone 7, and enroll in their annual trade in program or whatever even though my contract with att has one year left? I just want to be able to upgrade somehow to the new iPhone. If that's not it what else can I do?