I'm excited for the new iPhone 4 but I have a few lingering doubts about the situation with the "account holder". I'm currently on T-Mobile with a 3 line Family plan with my Dad, Mom and me. My Dad is the account owner/holder but currently away on a business trip. He's not in the US so I can't ask him to go to a local Apple Store and nab two iPhone 4s. However, my Mom does have his Social Security number, account number, and our most recent T-Mobile bill. Is that enough? I could even ask my Mom to get an ID of some sort that my Dad didn't bring with him on his business trip. I don't want to get up early tomorrow to wait in front of Walmart for an iPhone to discover that I can't switch carriers because my Dad isn't present. Thanks!