Lock or unlock your display, set a screen security lock type (pin, password, pattern, or fingerprint), get your PUK code, or request your device be unlocked from the AT&T network.
INSTRUCTIONS & INFO
To lock your device, flip the screen closed.
To unlock the device, flip open the screen.
To set a security lock on the device, from the home screen, select Menu.
Select Settings.
Select Device Settings.
Select Security.
Select desired option. Note: For this example Phone Security was used.
Toggle Phone Lock to On.
Enter a password and press OK.
To change the password, scroll to and select Change Password.