I have to second this. I've bought two of these devices over the years: first the Neo Freerunner and then a Pinephone Pro.

I spent over two years persisting, trying to get the Freerunner to a state where it was usable as a phone. Openmoko were more interested in rewriting from scratch and making sure it had pretty animations than things that some might consider more important, like working power management and phone calls.

For a long time I called the Freerunner "the worst phone ever made"...

...but then I bought a Pinephone. Which couldn't even play mp3s without stuttering - something even the freerunner could manage over a decade earlier. Don't get me started on the "quirkiness" of trying to use it to make and receive calls. Also the keyboard attachment I bought with it never worked. I tried multiple distros and whatnot, but I didn't get to spend a huge amount of time experimenting, because less than a month after I started to try actually using it, I dropped it, and it was so fragile that the screen was destroyed, despite me having bought a screen protector for it.

I've looked at a lot of these devices over the years and been tempted many times. I was very put off by the freerunner experience. The pinephone experience was actually almost impressive that it managed to be somehow worse.

I've just been scanning the postmarketos wiki looking at how that works with a few different devices. The number of devices that have some feature like calls / gps / camera / etc "partially working" is dismaying, particularly for open devices like the pinephone and librem.

Personally I switched to using lineageos on phones a long time ago. It's not ideal but at least it's usable as a phone.