Closed user group (Menu 4-6-4)
This network service specifies the group of people whom you can call and who can call you.
Preset
resets the phone to use a user group the SIM card owner has agreed upon with the service provider. A
closed user group is indicated by the
icon. For more information contact your network operator or
service provider.
Note: When calls are limited to Closed User Groups, calls may be possible to certain
emergency numbers in some networks (e.g. 112 or other official emergency number).