Zte Blade A51, User Manual

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You need to sign in to your Google account on the phone to
use all the
Smart Lock features.

Device admin apps: View or deactivate apps you have
authorized to be device administrators.

SIM card lock:

Lock SIM card: Activate or deactivate the PIN lock to
require the 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.

Encryption & credentials: Check the encryption status of
your phone and set the credential storage options.

Trust agents: View or deactivate trust agents.

App pinning: Pin an app's screen to keep it in view until you
unpin it. This feature can be used, for example, to let a
trusted friend play a specific game. See
Protecting Your
Phone With App Pinning .
Accounts
Open Settings and touch Accounts to manage your accounts
and synchronization. Touch Add account to sign in to or create