Does anyone know how to check data usage if you are using an iPad 3G with AT&T's unlimited plan? I had the 250 MB plan the first month and it showed how much data I used during the month, but there's no way to go back and look at it. I switched to the unlimited plan a week ago, but it doesn't show how much data I've used, nor does it show data for past months. With all of these changes in the data plans, that would be useful information. I can't figure out a way to sign up at the website to view information for an iPad account, and the apps for this all require an AT&T account with password. It is possible to check data sent/received through Settings/General on the iPad, but I doubt the accuracy of that. Or at least, I'm not sure it matches with how AT&T calculates data, which is the more important thing. The amount that it's telling me is off by quite a bit from the last data usage AT&T told me I used before switching plans.