Samsung Galaxy S III User Manual page 264

Wi-Fi Calling
Wi-Fi Calling is a free feature for T-Mobile customers using
this device with the new SIM card. Wi-Fi Calling is an
excellent solution for coverage issues in and around the
home or wherever cellular coverage is limited. Minutes used
while connected to the Wi-Fi network count against available
rate plan minutes.
For more information, refer to "Wi-Fi Calling" on page 58.
Configuring Additional Voice Call Settings
1. From the main Call settings page, tap Additional
settings.
2. Tap one of the following options:
• Caller ID: chooses whether your number is displayed when
someone answers your outgoing call. Choose from: Network
default, Hide number, or Show number.
• Call forwarding: configures the forwarding settings.
• Auto area code: allows you to automatically prepend a specific
area code to all outbound calls.
• Call barring: blocks specific types of calls (All outgoing calls,
International calls, etc..).
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• Call waiting: notifies you of an incoming call while you are on
another call.
• Auto redial: automatically redial the dialed number if it is
unable to connect or the call is cut off.
• Fixed dialing Numbers: manages fixed dialing numbers.
Configuring Call Forwarding
1. From the main Call settings page, tap Additional
settings Call forwarding.
Important! Call Forwarding is disabled when the Wi-Fi Calling
feature is enabled.
2. Tap an available option:
• Always forward: incoming calls are re-routed to a secondary
number that you specify.
• Forward when busy: forwards all your calls to voicemail when
your phone is busy.
• Forward when unanswered: automatically forwards to your
voicemail number when the phone is not answered, and
otherwise allows you to enter a voicemail number.