- Google Voice gives you a free number that works anywhere and can be used for texting and 2FA. (There are some exceptions.)
- Calling with Google Hangouts is free to some countries, cheap in others, and can be configured to show your Google Voice number as the caller. Unfortunately, the call quality cans be pretty bad, definitely worse than, say, Skype.
- Google Maps offline works great on iPhone.
It feels liberating to have no SIM. I'm not always reachable, and that's a good thing. I'm not always connected to the internet, also a good thing. I usually near urban or suburban areas, so free WiFi is everywhere. When I want to connect, I connect. Easy.
Along with living without SIMs, my family also has a policy of No Screen Day (NSD) once a week. We all put our phones, computers, etc in closet at 11pm and don't touch them until 6am two days later. No TV, no going to movies theaters, no screens of any kind. We love our NSDs. They cause us to do different kinds of things, sometimes just read books. It usually the best day of the week.