Thank you for a suggestion.
Yes, I have this module already installed. This module helps with A2DP which is stereo mode without a mic. I want HSP/HFP which provide mono audio and microphones instead of stereo. This option is available on MAC/Windows. But there is some bug in Linux regarding it.
I have Bluetooth headphone and I will like to attend all my video conferences with it. But problem is that PulseAudio doesn't support HSP/HFP so I cant have a microphone and mono audio on at the same time. I found from here https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/508522 that...