HowTo: enable debug mode with ofono
To enable debug mode you have to create a text file which ends with ".conf" in the directory "/var/lib/environment/ofono/" and set the variable "OFONO_DEBUG" to "-d". After a restart of ofono service it will log in debug mode for ofono. To undo this simply delete the file and restart ofono.
devel-su
echo "OFONO_DEBUG=-d" > /var/lib/environment/ofono/debug.conf
Simply reboot your phone. Then you can see what is going on
devel-su
journalctl --unit=ofono -f