windows-wide shortcut to start or answer phone calls
I want to switch fully from S4B to MSTeams. In S4B, I use PhoneTools from Estos, to answer phone calls with a single keystroke or to start a phone call. when I have marked a phone number and press the defined hotkey. See: https://www.estos.com/products/phonetools
So: You should implement the option for a windows wide shortcut/hotkey to start or answer phone calls.