I have been testing a HBH-15 headset with my P800.
Seems that the HBH-15 needs to be reset (LED flashing Green/Red) before it will pair with the P800
Generall Phone/headset call functions appear fine.
Voice dialling works when a match on the voice code is made.
However if you do not speak a voice code or it does not recognise the voice code then the voice dialling function stops operating.
It seems to reset after some period, but I have not been able to determine what function restores the voice dialling function. It seems like a power off headset and waiting a period seems to resore voice dialling. But seems just a bit hit-and-miss.
Any advice ??