Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
VIEW SOFTWARE VERSION: Swipe down from Notification bar, then select the Settings icon. Note: The images and steps in this tutorial reflect the latest software version (Android 8.0.0). For more information on the latest update available for your device, check att.com/softwareupdates.
Scroll to and select System. Select About phone.
Scroll down to view the Android version and Baseband version.
CHECK FOR SOFTWARE UPDATES: From the System screen, scroll to and select System updates.
Device will begin checking for an update. Select Done to continue.