Mobile phone + app WebRTc

Hi, I now use licode for video calls, chat, conferences
I miss the possibility of calling a ringing signal between two users -
will any of you help me for a fee?
if I click the link to the conversation on the mobile phone and on my PC, then I use the external speaker on the mobile phone - I would like to use the internal speaker - you have an available solution?
Dariusz.nowakowski@freepbx.pl