This is what i'm planning on doing tonight. anyone else? I was just curious, first off i'll be cross upgrading, and apple and at&t already said all i have to do is use the number thats upgrade eligible and then just call att&t when i get the phone. My question was: When i go to checkout, the only thing i'm gonna have to pay for initially is the sales tax, right? I think it comes out to like $50 or something like that for the iPhone 6+. Can anyone correct if i'm wrong, or if there's other steps i have to do?