I was wondering because when I upgraded to the iPhone 4, the Apple rep asked if I wanted the 200 MB data plan, the 2 GB data plan, or the unlimited data plan. Of course, I chose the unlimited data plan and when I logged into the MyWireless App to view my AT&T account information it showed me the list of features I have, one of which is the "Data Plan for iPhone." I clicked on the description and the first sentence read, "Data Plan for iPhone includes unlimited data in the U.S." It says nothing about a data cap. So, with that said, I'm a little confused. Is there a data cap, and if so, why would it be 2 gigs if there's already a plan for 2 gigs of data? Can someone explain?