I have 2 iPhones on the AT&T next plan. My plan is the 1GB mobile share plan. The bill was stated as $133 a month plus tax. Just looked at my first phone bill and it is $230. So let this be a warning as I had no idea there would be prorated charges!
Prorated charges are part of the game since cellphone companies existed.
You never had a wireless phone before?
Make sure you go over the bill and make sure its all right.