Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
Swipe down from the Notification bar then select the Settings icon. Note: The images and steps in this tutorial reflect the latest software version (6.0.1). For more information on the latest update available for your device, check att.com/softwareupdates.
Select the GENERAL tab, then select About device.
Scroll down to view Android version and device software Baseband version.
To update device software, from the About device screen, select Software updates.