# Disable the on-board Bluetooth module by editing
# the blacklist file and adding two lines
sudo nano /etc/modprobe.d/raspi-blacklist.conf

# Add the following lines to the file, then exit and save
blacklist btbcm
blacklist hci_uart

# Reboot to apply changes
sudo reboot

# Install ofono
sudo apt-get install ofono -y

# Confirm it is installed and the version
ofonod --version

# Start the ofono service
sudo systemctl start ofono

# Confirm it's running
sudo systemctl status ofono

# Install PulseAudio and its Bluetooth module
sudo apt-get install pulseaudio pulseaudio-module-bluetooth -y

# Confirm it installed and the version
pulseaudio --version

# Edit Pulse Audio configuration to use ofono
sudo nano /etc/pulse/default.pa

# Find the load-module module-bluetooth-discover line
# and add "headset=ofono" to end of it
load-module module-bluetooth-discover autodetect_mtu=yes headset=ofono