New software is available for your Xperia™ ion from AT&T

For Xperia™ ion users, this Android 4.0 update will provide faster Mobile Hotspot and Wi-Fi speeds. Exchange Active Sync also received several upgrades thanks to Android 4.0. Several calendar and e-mail status indication enhancements were made to help you
stay organized, while passcode security enhancements for unlocking Exchange Active Sync will give you more peace of mind. Up-to-date and improved visuals have been added to the street view in Maps, and when watching a YouTube clip you will also notice improved performance when rotating between portrait and landscape views.

You can download the new software by connecting your phone to a computer and using one of our computer applications.

http://www.sonymobile.com/us/software/phones/xperia-ion/