Zte V72A User Manual page 135

Encryption.

Set up SIM card lock:
Lock SIM card: Activate or deactivate the PIN lock to

require PIN before accessing the SIM card.
Change SIM PIN: Change the PIN used to access the 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.

Trusted credentials: Display trusted CA certificates.

Install from SD card: Install certificates from the memory
card.
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