I just purchased a Motorola H680 headset and have a persistent bug when attempting to use the voice dial feature. Pressing the feature button on the headset results in a "high-low" tone (signifying a connection with the BB) and no further action. When I try it with the BB out of the holster (and unlocked) I get a spectacularly useless error message, to whit "Unknown Error" displayed on the screen. Even more aggravating is that it will work once out of a dozen attempts.
So far, I've done both a soft-reset and hard-reset. I turned off echo cancellation (as it killed *all* audio through the headset) and ensured the BT options for "Allow All Outgoing Calls" is on (so it should work even when locked).
The event log shows the BT handsfree app kicking in and logs the status codes DD08 and SC01. Be nice if RIM used a few megabytes of their ROM for English error messages but I guess that's too much to ask for.
Any helpful suggestions are appreciated.