After trashing my Moto Roadster 2, I discovered that simply plugging my phone into my truck's aux input for audio worked just as well as the Roadster ever did. The built-in mic on the phone picks up my side of the conversation just fine, and the other end comes through the vehicle's speakers much more clearly than anything from the Roadster.

My HTC One M8 has a "Car Mode" feature; I have the Google Now app as one of the buttons on the main screen. I can tap that, say "Ok Google, call Dody DeBoulet at work," and I'm talking with the missus shortly thereafter.

If you have a dash mount for your phone, you may just want to give that a try (assuming you have an aux input in your car, of course).