Protecting Your Phone With Encryption - Zte Z740 User Manual

If you touch PIN or Password, you're prompted to set

a numeric PIN or a password you must enter to unlock
your screen.
The next time you turn on your phone or wake up the screen,
you must draw your unlock pattern or enter your PIN or
password to unlock it.
IMPORTANT: If you forget the pattern you set, try five times
and touch Forget pattern? to sign in to the Google Account
you have added on the phone and reset the screen lock. You
need an active Internet connection. You can also upgrade
the phone software. See

Protecting Your Phone with Encryption

You can encrypt all the data on your phone: Google
Accounts, application data, music and other media,
downloaded information, and so on. If you do, you must enter
a numeric PIN or password each time you power on your
phone.
WARNING! Encryption is irreversible. The only way to revert
to an unencrypted phone is to perform a factory data reset,
which erases all your data.
Encryption provides additional protection in case your phone
is stolen, and may be required or recommended in some
organizations. Consult your system administrator before
turning it on. In many cases the PIN or password you set for
encryption is controlled by the system administrator.
Upgrading the Phone Software.