The myAT&T app for iPhone has just been update to version 3.0.1 which may seem like a small point release but there's actually quite a bit there. If you use the myAT&T app to pay your bill straight from your iPhone, you will immediately notice a brand new interface.
While the biggest update was to the actual interface itself, a few more features make an appearance that make handling your accounts quicker such as fast account switching for folks that have more than one AT&T account login. If you were experience crashing issues when attempting to make a payment, those should now be addressed as well.
I noticed while digging through sub menus that anything you have to load the full site for will now load much better in-app which makes editing your account options almost completely mobile. You may find yourself having to use the actual website occasionally but the update definitely adds a lot of welcome features.