My Logitech H800 connects successfully via Bluetooth dongle to Xubuntu 20.04 and sound can be played through the headphones. But I can't use the microphone because the audio profile is High Fidelity Playback (A2DP Sink). It is not permitted to change the profile to Headset Head Unit (HSP/HFP) as this gives the error "Failed to change profile to headset_head_unit".
A solution was offered for this problem in Ubuntu 18.04 at Failed to change profile to headset_head_unit however it seems inapplicable to Xubuntu 20.04.
Although I have a configuration file at /etc/ofono/phonesim.conf there is no executable for phonesim or ofono-phonesim. Nor does there seem to be anything of that nature in the repository, so it is not clear how, if at all, it could be installed.
Is there a solution to the problem that will work for Xubuntu 20.04?
