Here's my situation. I have a Sprint contract. Went to ATT on launch day, bought iPhone, activated as NEW customer (got new phone number). The reason I did it this way was b/c if I didn't like it, I still had my Sprint phone and contract if I cancelled the ATT plan. Well, I want to keep the iPhone, and now port over my Sprint # I've had for over 7 years. Is this possible? I sure hope ATT doesn't treat this as "adding a line" because I don't want the new number they assigned my iPhone, just want to port my Sprint # only. Can it be done?