Lock or unlock your display, set a screen security lock type (pin, password, or pattern), get your PUK code, or request your device be unlocked from the AT&T network.
INSTRUCTIONS & INFO
SET A SECURITY LOCK: Swipe down from the Notification bar and then select the Settings icon.
Scroll to and select Lock screen and security.
Select Screen lock type, then select the desired screen lock type. Note: For this demonstration "PIN" was selected
Enter the desired PIN, then select OK.
Enter the PIN again to confirm, then select OK.
Select the desired notification settings, then select DONE.
CHANGE LOCK TYPE: Swipe down from the Notification bar, then select the Settings icon > select Lock screen and security> Screen lock type > select the desired screen lock type and follow prompts to complete set up.
UNLOCK THE DEVICE: Press the Home button.
CHANGE LOCK SCREEN TIMEOUT: Select Secure lock settings from Lock screen and security, then select Secured lock time and select the desired option.