I have a Nokia 5.4 running stock Android 12. My carrier supports WiFi calling on my package. I can't find the option to turn on WiFi calling in the menus but if I tell voice assistant to turn on WiFi calling it takes me to a screen with a button/slider to turn it on. Any attempt to turn this on results in it turning itself off immediately. What's the deal? Surely my phone supports this? Do I need a firmware update?