Calls via Bluetooth + Scrcpy [ Living by NOT touching PHONE ]
For me, while making phone calls, incoming sound has some noise/flickering sound. Outgoing (on their end) seems okay. Didn't try video over BT. Btw, there's SNDCPY https://github.com/rom1v/sndcpy which moves sound via TCP like SCRCRPY. It's a nice tool to look at.