Just got the S25 Ultra. Wifi calling notification was driving me up a wall. Found a fix that worked for me.
Go to settings:
Notifications-
App Notifications-
Three dots in upper right corner- show system apps.
Wifi calling:
With Sound and Vibration turned on you have the image of the phone with a dot underneath that says "Notification pop-up". Click dot and you have disabled the pop-up and can then turn off Sound and Vibration.
Morning update. It popped up again, but not the same app.
This time it was Phone services.
Same fix as above, only Phone Services.
Popped up again. Checking another app. Will post again if it works.
