Every other day lately I consider buying a pixel and throwing graphene on it and using it as a WiFi only device and uninstalling everything but the basics from my iPhone. Idk if I want two phones though. I heard WiFi calling in AT&T is buggy and I need to use that at home and work to make calls 🙃.
Discussion
I think enabling Wi-Fi calling via carriers definitely requires sharing your residence address or exposing your IP addresses to your carriers. GrapheneOS is not only a phone for a minimalist but also for a privacy-maximalist, so if you need ordinary features though you should keep using your phone, I guess🤔