Determine your current device software version and check for updates.
INSTRUCTIONS & INFO
VIEW SOFTWARE VERSION: Swipe down from the Notification bar with two fingers, 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 the General tab, then scroll to and select About phone > Software info.
Here you can view the Android version, Software version, and Baseband version.
CHECK FOR SOFTWARE UPDATES: From the About phone menu, select Software Update.