I am having a problem with Wifi calling which seems to be getting worse.
It's a Galaxy S9+ on a business contract with O2, and Wifi calling is enabled as I get no signal in my house.
After a reboot my wifi calling will appear in settings (and Phone settings) as expected:
After a few hours (no pattern but overnight for sure) Wifi calling will just stop working, and can't be found in Settings:
I am missing calls as the only way around this is to reboot the phone.
Have already raised this with O2 who have sent a new SIM card which I have installed, but no improvement. The phone (app and system) is up to date - Android 10.
So in my mind it's either 1) My wifi 2) S9+ hardware 3) S9+ OS 4) S9+ App 5) O2
I've eliminated as many of these as I can - 6 months ago I installed a Ubiquiti U6LR access point and my Wifi has fantastic strength all over the house. I have a spare S9+ which I have also tried, and O2 have done all they are prepared to, so I've reached the end of my troubleshooting.
Is there anything I can do to make this work reliably?