I don’t know if there’s something I’m misunderstanding here. I bought an iPhone as a gift from Apple (T-mobile). During purchase you have to provide a phone number; of course I provide mine, not the gift recipient, since that person should not know about the gift. But the result is that the gift recipient gets my phone number when setting up the new phone. It happened when I bought a new phone for my wife at Christmas. We had to go through a lengthy process with T-mobile to switch back phone numbers. Now same thing is happening as I bought a new phone as birthday gift for my son. This seems so stupid that I feel there is something I misunderstand.