[Q] pairing the tablet to the phone in the car topic

Hi, I would like to use my P3110 as the infotainment central of my car.
I have a bluetooth system which can receive everything.
So, I thought that I can connect the tablet to internet using my phone (nexus 5) as hotspot.
With this basic configuration, I can use the tablet as a navigator, while spotify plays my music.

The only problems are phone calls. Infact, if the tablet is paired to the car bluetooth system I have to pick the phone to answer.

Is there a way to bypass calls to the tablet?

Thanks a lot