Like a lot of people I am using someone else's upgrade to get the 5. My bro gets my 4S for free and I get the 5 at subsidized price. I am curious about setting my line up as it relates to the Sim card. I believe that the sim card that will be shipped with the 5 from Apple will be blank and that when I set the phone up from iCloud backup it will register it to my phone number. I know that previously when you bought from AT&T the sim was registered with the phone line info. Can anyone confirm my thought regarding a blank sim from Apple? Thanks!