04-19-2021, 05:57 AM
I guess it's solved. The matter didnt come from ModemManager but rather from kdeconnect which became the default call-app !!! removing it fixes this behaviour but I was suggested the following workaround in the calls matrix room (thanks to them) : in /usr/share/applications/gnome-mimeapps.list add the following lines :
x-scheme-handler/tel=sm.puri.Calls.desktop
x-scheme-handler/sms=sm.puri.Chatty.desktop
x-scheme-handler/tel=sm.puri.Calls.desktop
x-scheme-handler/sms=sm.puri.Chatty.desktop