Effective July 11, and as a limited time promotional offer for customers
who activate by August 31 on a three year contract, a data-only offering of
6GB of data for $30 per month is being made available that can be added to any
in-market voice plan. For example, with 6GB of data, iPhone 3G users can visit
35,952 web pages, or send and receive 157,286 emails, or watch 6,292 minutes
of YouTube videos each and every month.
For the sake of comparison, according to AT&T I used 242 MB of data transfer over EDGE in my most recent billing cycle — but I almost never load video or audio files over EDGE. I suspect anyone who makes frequent use of YouTube over the mobile network could go over 300 MB in a monthly easily. 6 GB, on the other hand, seems like enough to cover any reasonable usage.