Zte GRAND X Plus User Manual page 162

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Set up SIM/RUIM card lock:
Lock SIM card: Activate or deactivate the PIN lock to
require PIN before accessing the micro-SIM card.
Change SIM PIN: Change the PIN used to access the
micro-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 micro-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 micro-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.
•
Verify apps: Disallow or display a warning before you install
applications that may cause harm.
•
Storage type: Check the credential storage type.
•
Trusted credentials: Display trusted CA certificates.
•
Install from SD card: Install certificates from the phone
storage.
•
Clear credentials: Delete all certificates.
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