We have recently moved and find ourselves in a gap in coverage. The network status checker is inaccurate and when raising an issue I get a text telling me that everything is fine. I have raised it twice. It recommends that I post here which I am happy to do. The postcode is RH5 4EN.
WiFi calling - yes, that works sometimes but my phone will frequently say it is not registered on the network and refuse calls. No SMS messages unless I drive away from the house - a real problem when things use SMS for 2FA
Good luck O2 Gurus.