Wi-fi calling not working on my IPhone XR under 13.4.1

Apple have just taken Cellular logs with me going from 1 bar to 4 bar cellular coverage. Let’s hope they get to the bottom of this quickly we have such poor cellular signal internally and being coupled up in Covid19 we need all the reliable comms we can get

I noticed when I used a different Wi-fi connection that the WiFi calling worked. I had set up an external DHCP server after being told to by Hyperoptic. The other Wi-fi network I accessed was also an Hyperoptic WiFi router so I thought if I factory reset my router would that work. Hey presto it did!!,! It still doesn’t explain why the iPhone 6s worked but not the iPhone XR but it’s working now!!!

It’s Vodafone and when I swap my SIM over to an iPhone 6S (my old phone)’it works so it’s not carrier related

and like the guy said above and CONTRARY TO WHAT APPLE SUPPORT SAID WI-FI CALLING WORKS ON AIRPLANE MODE !!!

Interestingly https://discussions.apple.com/profile/SravanKrA Apple say that WiFi calling will be disabled if I put Airplane mode on with WiFi enabled but your SE stays on WiFi calling!!!!