Being that I was on the road recently, I used quite a bit of text messages. I began to get nervous about going over so here's how you check your SMS usage.

Under the standard iPhone/AT&T package you get 200 text messages. To see what you have left, setup a new Contact entry like "Check Text Messages" and assign it the 'phone number' *3282#.

I even made this a Favorite so I can get to it with fewer taps. When you dial that number, you'll get a FREE text message telling you how many text messages are left on your account for the month.

You can use *646# to view your minutes usage.