ZTE Grand X Plus - Manual (Page 162)

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• Set up SIM/RUIM card lock:
X
Lock SIM card: Activate or deactivate the PIN lock to
require PIN before accessing the micro-SIM card.
X
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.