Zte N9517 User Manual page 127

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.

Trust agents: View or deactivate trust agents.

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