LG F9200 - Manual (Page 76)

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Settings
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Note
TTY users must have a TTY/TDD device.
TTY: Tele Type writer
TDD: Telecommunication Device for the Deaf
Send DTMF (Menu 9.4.8)
You can send the DTMF (dual tone multi-frequency)
tones of the number on the display during a call.
This option is helpful for entering a password or
account number when you call an automated system,
like a banking service.
Security Menu 9.5
Various codes and passwords are used to protect the
features of your phone. They are described in the
following sections (see pages 19)
Request PIN Code (Menu 9.5.1)
When the PIN code request feature is enabled, you
must enter your PIN each time you switch the phone
on. Consequently, any person who does not have your
PIN cannot use your phone without your approval.
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Note
Before disabling the PIN code request feature, you must
enter your PIN
The following options are available:
]
Enable: You must enter the PIN each time the phone
is switched on.
]
Disable: The phone connects directly to the network
when you switch it on.
Auto Key Lock (Menu 9.5.2)
When you enable Automatic key lock, keypad will be
lock automatically on an idle screen after selected
seconds without any key requesting. if you set to Off,
keypad will not be locked automatically.
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Note
If you want to unlock your phone keypad, press the left soft
key [Unlock] and then press the right soft key. But if you
enabled Automatic key lock before, your phone keypad will
be unlock and then after selected seconds the keypad will
be lock up again automatically.