- An iPhone you want to use with a SIM card from any other network provider than AT&T
- An iPhone you have activated through iTunes deciding to transfer your phone number from another provider. Useless for (at least) the first 24 hours (that’s what the customer support e-mail says).
- An iPhone using AT&T’s darn-slow EDGE network to browse the web.
Oh, and by the way: Sushi came up with some interesting calculations on wasting money while waiting for the iPhone.