I have the v710m and have not had any problems. I have only heard people say it sounds like I am far away but I have since then increased the BT mic volume. My girlfriend who has the Razar, in my opinion, sounds much worse (although she drive a RAV4 and not a TCH). Try leaving your self a voice mail.

Also, does this happen even when the phone is right there with you in the front of the car? Does it happen all over or just in certain places (geographically)?

On a side, I have sometimes had connection issues where it would fail to connect but then shortly after try again and work just file. I am speaking about the BT connection.