I am getting a new iphone 4 for myself. My wife and i both have iphone 3g. Her battery seems to be bad,can i take her sim and put into my iphone 3g so she can use it? I am just going to make her old iphone a spare ipod or something. Do i need to have att do anything or can i just switch and go?
can I swap iphones with my wife, how to swap iphones

