I just ordered two phones under one Apple ID because I was already signed into the iPad app. One was for me, the other for my girlfriend. She has a different last name and separate debit card. We both upgraded separate AT&T accounts. I don't suspect there will be an issue, but just want to make sure there isn't a 1 per Apple ID limit or any issues regarding two people ordering from the same Apple ID. Guess you can call this post-order anxiety.