I don't believe they're the same thing. I can connect to the 4G data networks with the Banana, but not make calls, and I'm not sure as to the details of why -

I don't believe they're the same thing. I can connect to the 4G data networks with the Banana, but not make calls, and I'm not sure as to the details of why - going deep into cell network reverse engineering wasn't my goal here, I wanted to experiment with the state of non-iOS, non-Android cell phones in post-2020. I got a lot of data, but... well, I'm back to iOS, so I couldn't make it work. There are KaiOS devices that support VoLTE and work on US carriers, but the Banana doesn't seem to be one of them. In addition to its many other pain points. Those keys suck to hit...