Originally Posted by Tokyo Slim
I'm pretty sure you don't have to tell them what phone you are using.
I think his point is that carriers claim that contracts are to subsidize the cost of the phones which they give to you for less money. Since you're buying the N1 at full price, AT&T should offer you a cheaper rate.
The N1 on T-Mobile is available for a subsidized, cheaper price on contract.
I don't really see the point of a having a phone off of contract if you know you'll be sticking with the carrier though. It's not like you can take the T-Mo N1 and use it on AT&T or vice versa.