Recently I upgraded to the new iphone, and it all went very smoothly. When I got home to transfer all the data, I found that my new iphone had a separate phone number. The payments for it are listed with my old account, which I wanted. Yet the new iphone is not listed on my old account, and it instead has a new number and account associated with the data plan. I want to transfer it back to my old account and remove my old phone from that data plan, but I'm stumped on what to do.