Buick Regal Navigation Manual page 82

Call waiting must be supported on
the Bluetooth phone and enabled by
the wireless service carrier to work.
This feature allows switching
between calls, making one call
active and placing the other on hold.
1. Press the Phone Menu button
on the screen to access the
Phone Menu.
2. Turn or press the Menu knob to
Switch Calls and press Enter or
press the Switch Calls option.
Conference and three-way calling
must be supported on the Bluetooth
phone and enabled by the wireless
service carrier to work.
To start a conference while in a
current call:
1. Press the Phone screen button
on the Home Page or
the faceplate until the Phone
main screen is shown with the
current active call.
2. Press the Phone Menu button.
3. Press Enter Number on the
/ on
screen.