Hello!
 
This is a proposal much more conceptual than aesthetic. You would find the main document in the /Concept Design/ folder in PDF (also available in individual images in PNG). 

It´s necessary to read the second sheet, with this you will be able to understand the reason for the differentiation between spaces (chat and waves), the modules (with the two types of canvases: infinity and grid) with design functionalities (areas, subgroups, radio mode, "raise your ear", call canceled reminder, picture-in-picture for share screen, pinned file on call) and a reorganization of the settings for calls (micro and macro controls). 

A cordial greeting.