i have an existing at&t that has data plan and i just bought an iphone. i dont know wether its 1.1.1. or 1.1.2 ver all i know is its 04.02.13_G. all i want to do is not to unlock but bypass registration so i can use my old sim because they said im going to loose my discount and again renew my 2yr. contract. is there a simple way to do this? any comment will be greatly appreciated.