Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
VIEW SOFTWARE VERSION: Swipe down from the Notification bar, then select the Settings icon. Note: The images and steps in this tutorial reflect the latest software version (Android 8.1.0). For more information on the latest update available for your device, check att.com/softwareupdates.
Select the General tab, then scroll to and select About phone. Select Software info.
Here you can view the Android version, Baseband version, and Software version.
CHECK FOR SOFTWARE UPDATES: From the About phone screen, select Software Update.
Select Update now. Note: If an update is available, follow the on-screen instructions to perform the update. If an update is not available, select OK.