Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
Swipe down from 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.
Scroll to, then select About.
Scroll to, then select Software information to view the Android version. Select More to view the Baseband version.
To check for software updates, scroll to, then select AT&T software update from the Settings menu.
Select Check for updates. Note: If an update is available, follow the on-screen instructions to perform the update. If an update is not available, select OK.