See also:

Engine
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To Resume Speed
To resume a previously set speed, push the RES (+) button and release. Resume can be used at any speed above 20 mph (32 km/h). ...

Making A Second Call While Current Call Is In Progress
To make a second call while you are currently on a call, press the button and say “Dial” or “Call” followed by the phone number or phonebook entry you wish to call. The first call wil ...