Phone Lock; Call Barring; Fixed Dial Number - LG MG230d Guia Del Usuario

Settings
5. You can enter your PUK code up to 10 times. If you enter the wrong
PUK code more than 10 times, you can not unlock your phone. You will
need to contact your service provider.

Phone lock

You can use a security code to avoid unauthorised use of the phone.
Whenever you switch on the phone, the phone will request a security code if
you set the handset lock to When power on. If you set the handset lock to
When SIM changed, your phone will request a security code only when you
change your SIM card. If you set the handset lock to Immediately, the phone
will request a security code as soon as the option is selected.

Call barring

The Call barring service prevents your phone from making or receiving certain
category of calls. This function requires the call barring password.

Fixed dial number

You can restrict your outgoing calls to selected phone numbers. The
numbers are protected by your PIN2 code.
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On
You can restrict your outgoing calls to selected phone numbers.
88
(Menu 9.7.2)
(Menu 9.7.3)
(SIM dependent) (Menu 9.7.4)