Zte Z983, User Manual

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NOTE:
You need to sign in to your Google account on the phone to
use the
Smart Lock feature.

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.
NOTE:
Put all your confidential passwords in a safe place for future
use. If you enter the wrong SIM PIN more times than
allowed, your nano-SIM card will be locked and you cannot
access the mobile phone network. Contact your operator for
a PIN Unlock Key (PUK) to restore the nano-SIM card.

Make passwords visible: Display passwords as you enter
them.

Device administrators: View or deactivate apps you have
authorized to be device administrators.

Unknown sources: Check this option to permit installation
of apps from sources other than the Play Store.

Storage type: Check the credential storage type.

Trusted credentials: Display trusted CA certificates.

User credentials: View and modify stored credentials.

Install from SD card: Install certificates from the storage.

Clear credentials: Delete all certificates.