If you have calls only forwarded to Google Chat the only way you'd receive calls is if the app was running. If the app is stopped, it's not connected so it can't receive calls.
OK, so if I disable 'Allow 3/4G calling' and select 'Use GvIP on Wifi only' will that allow the device to ring natively while the app is still running ?
I know it makes no sense, because then what is the point of having the app.
I am not ready to give up on this yet, but I need to be able to receive calls, that currently using the app, the other party can never hear me.