Find "Call waiting"
Press Menu.
Scroll to Settings and press the Navigation key.
Scroll to Call and press the Navigation key.
Scroll to Voice call and press the Navigation key.
Scroll to Call waiting and press the Navigation key.
Turn call waiting on or off
Highlight Enabled or Disabled and press the Navigation key to turn the function on or off.
Return to the home screen
Press Disconnect to return to the home screen.