Samsung SGH-D500 Manual page 179

Settings
2. You can activate or deactivate the call waiting feature
as necessary by selecting the Activate or
Deactivate option respectively and press the Select
soft key.
To return to the previous screen, press the Back soft
key.
You can also deactivate all call waiting settings by
selecting the Cancel all option.
Network selection
The Network Selection feature enables you to
automatically or manually select the network used when
roaming outside of your home area.
Note: You can select a network other than your home
network only if there is a valid roaming agreement
between the two.
To automatically or manually select the network to be
used when roaming:
1. Press the Up or Down key until the appropriate
option highlights and then press the Select soft key.
If you select Automatic, you are connected to the
first available network when roaming.
If you select Manual, go to step 2.
2. Press the Up or Down key until the network you want
highlights and then press the OK soft key.
The phone will scan for that network and you will be
connected.
Caller ID
You can prevent your phone number from being
displayed on the phone of the person being called.
Note: Some networks do not allow the user to change this
setting.
The following options are available:
Default: the default setting provided by the network is
used.
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(Menu 9.5.4)
(Menu 9.5.5)