LG L1400 - Manual (Page 23)

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Access Codes
You can use the access codes described in this section to avoid
unauthorized use of your phone. The access codes can be changed by using
the Change Codes feature (Menu 9.5.4).
Security code (4 to 8 digits)
The security code protects the unauthorized use of your phone. The default
security code is set to ‘0000’ and the security code is required to delete all
phone entries and to activate the Restore Factory Settings menu. The
security code default setting can be modified from the Security Settings
menu.
Barring Password
The barring password is required when you use the Call Barring function.
The password is obtained from the service provider when you subscribe to
this function. See page 104 for further details.
Getting Started