Samsung SGH-D307MSACIN - Manual (Page 154)

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Closed User Group (SIM Dependent)
This network service allows incoming and outgoing calls
to be restricted to a selected user group. you can create up
to 10 user groups.
For details about how to create and use a closed user
group, contact your service provider.
Example: A company lends SIM cards to its employees and wants to
restrict outgoing calls to members of the same team.
If you select the Closed User Group menu, you can enter
the CUG function. You can now access the following
options:
• Index List: lets you list, add, or delete CUG index numbers.
If there is no CUG index stored, you are prompted to add a
new index when you select this option. Once you have added
a CUG index, the list of current CUG indexes appears.
Add a new CUG index as advised by your service provider, or
delete a group.
• Outside Access: lets you enable or disable calls to numbers
other than those in the CUG. This feature depends on the
nature of your CUG subscription. Please check with your
service provider.
• Default Group: you may set a default CUG with your service
provider. If you have done so, you can enable the Default
Group option on your phone. When making a call, you are
given the option of using your default CUG, instead of
selecting one from the list.