Trading my edge iphone with a friend's 3g HELP

[eddyhttp]

I have a friend who wants my first generation iphone edge because of the cheaper bill. He will buy the newest iphone 3g and we will trade phones. I am going to meet up with him at the store with my mother so I can change my service to 3g.

Is it possible for this to happen at the att store?

[Lucbert]

Thats not going to work, because when he buys the 3G AT7T requires him to sign up for a 3G data-plan.