'evening. i'm getting ready to sell my ipad1 (64gb/att3g) to a friend. i've been using the att 3g regularly and continue to use on my ipad2. i want to pass the ipad1 with the sim in it so my friend can set up her own account without having to source/pay for a sim. i'm right at the end of my bandwidth allowance. questions... if i cancel my att account from the settings - cellular data menu, will that decouple the ipad1's sim/imei from my att account/login? or, is there somewhere else to manage devices on my 3g data plan? or, will my planned complete reset of the ipad1 suffice? tia!