I have a phone and a TomTom rider and want to be able to take phone calls through the TomTom and listen to music on my phone.  I connected my phone to Mobile 1 connection and TomTom to GPS connection which works great for music and instructions but doesn't allow phone calls as it can't pass through from TomTom.  I was able to do this on my Scala headset.

I did try connecting my TomTom to the Mobile 2 connection, but I get the same result of music and GPS instructions but still I can't hear the caller and the caller can't hear me.

My only option is to disable hands free on the TomTom which then works, but it means I can't use the TomTom to make or receive calls.