Hi StanZV,
don't buy a bluetooth adapter. I bought 2 of them and owned 2 bluetooth headsets. The headsets worked fine and could be muted with my cellphone, iPad and Firetablet. The Headsets worked with the bluetooth dongles aswell BESIDES muting the headsets, both failed.
The problem is on mircrosoft side, don't waste time trying to fix it with this list above... it will not work.
I have no clue, why it is such a big problem for microsoft to fix this issue! My mainboard has no bluetooth, so i have to use dongles to get bluetooth ready. One is from tp-link and one is from Asus, both can't mute the micro...
I don't know what to do, im using skype on my Firetablet instead on my PC, it is really annoying.
MikelWest