Interesting AT&T "dial" features

I knew it was possible to "dial" a number on your AT&T phone and get my minutes balance for the month. But there is more than just minutes:

*BAL# to check your balance
*MIN# to check minutes remaining
*DATA# for data remaining (if you don't have unlimited data)
*PAY to pay your bill
*NEW# to see if you are eligible to upgrade to a new phone

Just enter the above "numbers" in to the phone and press dial. I used to have TMobile and they had some similar features.