I have an Iphone 4 for Verizon. I know that I could just restore the phone to factory setting. But my phone number and information to my account with Verizon will still remain because Iphone's for Verizon do not have sim cards. How do i COMPLETELY restore the phone so that all My information is gone as well. So that he could just go to Verizon and have it set up? I dont want to sell him the phone and then when people try to call me the phone rings. Your help would be greatly appreciated. Thanks.