Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
For hands-free operation of your tomtom GO 600 you need to connect with Bluetooth and its PAN (Personal Area Network) facility.
And for hands-free calling with tomtom 600, you need to use the A2DP protocol with the connection. Nothing else will work.
Here is a page with further information specifically about compatible operation of TomTom and your smartphone:
- some specific points: Android OS 4.0 required, at minimum. In your phone's Bluetooth settings, is Bluetooth enabled and is your phone Discoverable? if so, make the link between tomtom device and your phone immediately.