I can see the next T-Mobile commercial now...
Claire: What's the matter iPhone 4?
iPhone 4: Ahh, I just went over my 250MB limit in data this month. Now I have to pay another $15.
Claire: You know T-Mobile offers unlimited data for just $10 a monfff....
<AT&T Guy interrupts by shoving dollar bills into her mouth>
AT&T: Shhhh...