Eh what? 👀
You have your phone in constant Airplane mode/No Sim, and are living all day everyday in wifi range?
Essentially. Not Airplane Mode, but yes to no SIM. I'm sometimes out of Wi-Fi range during outings, but plenty of my typical locations offer Wi-Fi access, and my ISP contract includes all kinds of Wi-Fi access points.
I started questioning the idea that people need phone service at least 15 years ago, and today I can only recommend not having it.