LG GD570AW.AAWCAQ Guide De L'utilisateur page 159

you are in an airplane or in any other area where
wireless connectivity is prohibited. When your phone
is in Flight Mode, it cannot send or receive any calls
or access online information.
Security
The Security feature enables you to restrict the use
of your phone by others and to restrict the types
of calls. Various codes and passwords are used to
protect the features of your phone.
Phone Lock
Set the phone lock to avoid unauthorized use. You
will need a security code.
When the Phone Lock feature is enabled, the
phone locks and you must enter the 4-digit phone
password to use it. Scenarios included are: When
Power On, When SIM Changed or Lock Phone Now.
Note: To change the phone password, see
"Change Codes" on page 158.
PIN Code Request
When the PIN Code Request feature is enabled,
you must enter your PIN each time you switch on
the phone. Consequently, any person who does not
have your PIN cannot use your phone without your
approval.
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