It's official, I'm getting the iPhone for Christmas and I can't wait! I'm going to go to the apple store today to look at some cases to have ready when I open it. I have a question, though: How does the activation process go? Am I suppose to setup a service with AT&T (whom I am switching to) and get a sim card, or will the same card be in the iPhone and I'll be able to do everything from my iTunes? I know I'll be transferring my T-Mobile number if that accounts for anything. I am reading the iPhone manual at apple's website and it says I need to go setup an account with AT&T first. Please fill in the blanks for me!