Solved! Go to Solution.
Sorry I didn't spot this thread sooner, but we had a slight issue yesterday on our end that could have potentially caused some intermittent issues with wifi calling, but it has been fully resolved now. If you're still not seeing the wifi calling setting (but you've previously had and used it on a supported device), please do a full reboot of your device (not a reset, just a reboot!) and it should bring it back.
Sorry for any issues this would've caused, but we hope it's not something you'll experience again.
PS. If a reboot doesn't sort it, try flipping airplane mode on/off, and if still nothing, maybe a manual reconnection to the network via the network selection option. If still an issue, PM me.
I have exactly the same isue, but on a Samsung Galaxy S7 Edge.
I use wifi calling all the time as signal very bad in my location. Yesterday it was working, today it's not a and the menu option in the phone gone.
I have tried uninstalling and re-installing the my O2 app (saw this suggested in another thread). I have opted out and back in of wifi calling. Many phone restarts, had the sim out, no joy.
I spoke to someone at O2 who I think logged a ticket, but I called an hour later and they could not find it!
The second O2 person I spoke to said I was not the only person to report this today.