I have an iPhone 14, a Toob internet connection and a pay monthly O2 SIM-only contract. I previously used WiFi calling on Vodafone via Virgin Media before switching both providers and that worked fine, and I think it may sometimes have worked on the present setup but at the moment it never does; the phone shows the network as "O2 WiFi Call", but if I try to make a phone call I just get silence. Other internet functionality works perfectly well over that connection. I have tried restarting the phone and disabling IPv6 on the router, but neither makes any difference. I'm not sure whether SMS uses WiFi calling or not, but I am certainly able to receive SMS messages when WiFi calling is enabled. Any suggestions on how to fix this would be greatly appreciated.
