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 7.0). For more information on the latest update available for your device, check att.com/softwareupdates.
Scroll to and select About phone.
Scroll down to view the Android version and Baseband version.
CHECK FOR SOFTWARE UPDATES: From the Settings screen, scroll to and select AT&T Software Update then select Check for Updates.
The device will begin checking for updates. If an update is available, follow the prompts. Otherwise, select OK to confirm.