I've been battling this since swithcing to Xfinity mobile. Had ATT before, worked seamlessly on same routher and connection. iPhone Xs purchased from Xfinity when I switched. Calls drop almost every time when answered at home. I get 1 bar in my house, and it rarely switches to WiFi calling. I've tried every trick in every thread I've found and nothing works. On the latest carrier software and iOS update. Sometimes I can force it to WiFi calling by messing with the settings and resubmitting emergency address for the 100th time, but usually it doesn't work. My phone is functionally useless at home due to this. This is a problem that's been going on for YEARS and Xfinity has yet to address it properly. I'd switch back to ATT in a heartbeat if I could afford it.
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