I have a question therefore for other iPhone/iPad users with AT&T's 2GB data plan. Given that I have used 4GB of data on the phone since June (I haven't reset the statistics on my iPhone 4) I don ...

For example, paying for Unlimited lets you share with up to 5 users, backup both phone and computer files, share storage, and search across devices.

AT&T and T-Mobile recently made changes to their unlimited plans. Here's why they are so upset with data abuse.