Samsung SGH-T709BKBTMB - Manual (Page 110)

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If you select Automatic, you are connected to the first
available network when roaming.
3. If you select Manual, press the Up or Down Navigation
key until the network you want highlights and then press
the Select soft key or the
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 you to change this setting.
The following options are available:
• 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.
Security Settings
The Security feature enables you to restrict the use of your
phone by others and to restrict the types of calls.
Various codes and passwords are used to protect the
features of your phone.
PIN check
When the PIN Check feature is enabled, you must enter
your PIN each time you switch on the phone.