I used to order all of my new phones through AT&T or pick them up in store. AT&T always required that the phones be activated immediately, though one year they did put a 30 day hold on it for me because I was purchasing the phone as a Christmas gift and didn't want it opened yet. I'm doing the same for my grandmother this year but I've ordered the phone from Apple.com. It came today. Do I have a certain number of days before the phone must be activated, or can I just leave it sealed until Christmas and do it then?