Most new Volvos come with built-in bluetooth. Why? So one can talk on their cell phone hands-free through the car stereo.
My guess is that anyone with a bluetooth cell phone has a bluetooth earpiece mic/headphone unit. My question is, does anyone out there hassle with getting their bluetooth cell phone hooked up to their car when it's already hooked up to their earpiece? My guess is that the earpiece wins and the car technology is wasted.
(FYI, I'm a follower of tech - but not necessarily a user; my laptop has bluetooth but it goes unused. I don't even have my own cell phone.)