Samsung SGH-C207CSACIN - Manual (Page 115)

Network Services
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Default: the default setting provided by the network is
used.
Hide Number: your number does not display on the other
person’s phone.
Send Number: your number is sent each time you make a
call.
Closed User Group (CUG)
This network service allows incoming and outgoing calls
to be restricted to a selected user group. You can create
up to ten user groups.
Note:
This option must be supported by your carrier and subscription is
required.
For details on 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.
Activating a Closed User Group
If you select the Closed User Group menu, you can enter
the CUG function. You can now access the following
options after pressing the Select soft key or
key:
Index List: lets you list, add or delete CUG index
numbers. The list of current CUG indexes appears. Add a
new CUG index as advised by your service provider or
delete a selected group.