LG G5400 User Manual page 61

You can restrict your outgoing calls to selected phone numbers. The
numbers are protected by your PIN2 code.
You can restrict your outgoing calls to selected phone numbers.
You can deactivate fixed dialling function.
You can view the number list saved as Fixed dial number.
PIN is an abbreviation of Personal Identification Number used to
prevent use by only unauthorized person.
You can change the access codes:
.
If you want to change the Security code/PIN/PIN2 code input
your original code, and then press < [OK].
Input new Security code/PIN/PIN2 code and verify them.
You can select a network which will be registered either
automatically or manually. Usually, the network selection is set to
.
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