Zte Z557BL User Manual page 144

Tap beside Screen lock to set the following options.

Make pattern visible: Show the pattern as you draw it.
This option is available when unlock pattern is set.

Automatically lock: Set the time needed for the lock
protection to be activated after the screen turns off. This
option is available when unlock pattern, PIN or
password is set.

Power button instantly locks: Lock protection is
activated immediately when you press the Power/Lock
Key. This option is available when unlock pattern, PIN or
password is set.

Lock screen message: Set the text that you may
display on the lock screen.

Smart Lock: Keep the phone unlocked when connected to
trusted devices, in trusted places, or unlocked when your
phone is being carried on the body.
NOTE:
You need to sign in to your Google account on the phone to
use the Smart Lock feature.

Encrypt phone: Encrypt your data on the phone to protect
your privacy.

Set up SIM card lock:
Lock SIM card: Activate or deactivate the PIN lock to
-
require PIN before accessing the nano-SIM card.
Change SIM PIN: Change the PIN used to access the
-
nano-SIM card.
144