Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
To view your software version, swipe down from the top of the screen with two fingers, then tap the Settings icon. Note: The images and steps in this tutorial reflect the latest software version (Android 6.0.1). For more information on the latest update available for your device, check att.com/softwareupdates.
Scroll to, then tap About phone.
Scroll down to view the Android verison, Build version, and Baseband version.
If an update is available, follow the on-screen instructions to perform the update.