Check out this post
http://priuschat.com/index.php?showtopic=9214
It looks like the Jabra 210 sends out a headset protocol VS and hands free protocol. The TCH using the hands free protocol.
I just ordered the sprint LG 350 phone that someone here said they got to work. I was using a nextel, and since they are the same company now, swapping phones (well buying a new one) isn't that big a deal, as I get a discount on it from my company.
I will let you know if it works.
This is one great vehicle though. It seems I've found something new about it every day since I've owned it (barely two weeks)
Byron