Edward via tde-users wrote:

> blueman-manager is installed. The system tray has Kmix in it.
> 
> HSP/HFP is accessible with certain headphones, once the ofono package
> is installed and after a system reboot. Although the microphone works,
> the audio is somewhat subdued. After testing several Bluetooth headsets,
> I have two that will work.

The audio can be configured in pavucontrol, because the devices are created
on the fly and kmix still can not work like this.
in PA control when connected you check under Configuration how the device is
set. My phone showed very often as OFF. I had to manually set the type