Everything else is on your iPhone, why not be able to access your at&t account from your phone. The at&t mywireless app allows you to pay your bill, modify plan features, and view usage all from your phone. This app is very handy if you are in a hurry and want to pay your bill nice and fast. I have used this app many times to pay my bill and it works perfectly. Here are some screens of the app in action.