Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
Swipe down twice from the Notification bar, then select the Settings icon. Note: The images and steps in this tutorial reflect the latest software version (Android 7.0). For more information on the latest update available for your device, check att.com/softwareupdates.
Select About phone.
Here you can view the Android version, and Baseband version.
To check for software updates, from the Settings menu select AT&T Software Update.
Select Check for Updates.
If an update is available, follow the on-screen instructions to perform the update. If an update is not available, select OK.