This is what will happen sooner or later. One cheap, non-rooted, Googled Android phone at home for 2FA and other official nonsense, powered off when not in use.

All other business, including personal communications, conducted on a GrapheneOS device. These days you don't even need a phone number for your everyday device, a data-only roaming plan like silent.link is enough. This is not yet necessary in the U.S., but we are dangerously close.