Prior to Oct of 18 our Wifi calling worked fine. Since that time not a one of our 4 iphones (all different models) can use Wifi calling. We have google home mesh with ATT internet. I've turned off wifi assit turned on and off wifi calling and every time we answer a call at home the call drops within 1 min of answering.
We have very little cell signal here at the house and okay internet service. Please help.