I have a Nexus one on ATT with Android 2.2. Voice dialing is very problematic. When I got the phone both the Voice Dial icon worked as well as Bluetooth dialing (although not very accurately). Then after a few days the voice dial icon stopped working -- would start and then display "please try again" "try restarting the phone" . Soon after that the bluetooth dialing stopped working. I reset the phone to the factory setting and both feature worked again for a short time and then the same problem arose. Nothing short of reseting the phone seems to fix the problem. Any ideas?