It makes phone calls and text messages. The battery lasts almost a month. My wife can call me in an emergency. I wired up a few work outage alerts with IFTTT. That's about it.

The best part about it is that it leaves me alone. When I turn my smartphone back on, it's incredible to see the barrage of worthless notifications that would have distracted me throughout the day. I no longer check my phone aimlessly because there's nothing to do.

I wrote about it here: https://medium.com/@LastZactionHero/quitting-the-smartphone-...