budfromgumball:
Make sure your phone is set to allow voice dialing. Even if you have to train your phone to use voice dialing, setting simply to use voice dial should alloow it to work on the Sync system (and you don't need to train it or set all your entries in your phone book to voice... just make sure its on, and you can do at least one voice call with your handset, and you should be good). That was the case with my wifes Motorola phone.
Count me as a fan of Sync, works extremely well with my Blackberry Curve and my wifes Motorola Razor... even with the windows open!
Eric