LG G7100 User Manual page 67

The Call barring service prevents your phone from making or
receiving certain category of calls. This function requires the call
barring password. You can view the following submenus.
The barring service for all outgoing calls.
The barring service for all outgoing international calls.
The barring service for all international outgoing calls except home
network.
The barring service for all incoming calls
The barring service for all incoming calls when roaming
You can cancel all barring services.
You can change the password for Call Barring Service.
Allows to request the network to set call restriction on.
Set the selected call restriction off.
66