I've just bought a scala multiset q2. TomTom rider2 connects to one scala headset but when I then try to connect my iphone to the same scala headset I get error messages. the best I've managed is TomTom bluetoothed to one scala and iphone connected to other scala. Why can't I connect both TomTom and iphone to one headset? Many thanks
GPS - Tomtom - RIDER GPS Devices