My little brother has a Nokia on AT&T not under contract. I have an unlocked/jailbroken iPhone with T-Mobile with a contract that expires in one year. I MIGHT want to port my number to AT&T to get a 3G iPhone w/new 2 year contract. If I did, my brother would take over the rest of my contract with T-Mobile (if it's possible, of course). I know it's possible to port my number from T-Mobile to AT&T, but would my brother be able to move his number to T-Mobile and continue with them? I want to do this to avoid the early cancellation fee.