I have the Voyager Pro and a Samsung Vibrant. Tonight they stopped talking to each other.
I put the VP into pairing mode with the led flashing red/blue, and tell the Vibrant to Scan devices.
It finds the VP. I touch it to pair with the VP. After about a minute, it puts up an error screen:
Unable to pair with PROPlantronics. Incorrect PIN or password.
This is strange because I never got the dialog to enter the PIN.