Bluetooth works when listening to music fine. Anything to do with calls causes the audio to toggle between the standard phone audio and Bluetooth.

I don't understand the human body comment. Seems like poor translation.

Problem: I have a BT headset Sennheiser momentum 2.0. When I connect and listen to music it is seamless.  However if I try and take a call the audio toggles between Bluetooth / phone audio...over and over. Headset / phone speaker / headset / phone speaker.   I can use the headset buttons to hangup /...