Comment by OneDeuxTriSeiGo

> Does anyone know what data doesn't go through the vpn?

I can't speak to exactly what data doesn't go through their VPN but I know carrier apps tend to not play nice with VPNs, especially the Google Fi app (as it relies on its connection and what IP its on to coordinate switching between their various carrier contracts and that seems to break under a VPN).

And also seemingly Wi-fi calling has been problematic over VPN for as long as I can remember so that's usually a safe bet for exclusion.