I bought a PinePhone a year or so ago (I don't remember exactly when). When I got it, the PostmarketOS was all but unusable. It was sluggish, and very little actually worked. I bought it with the intent of developing on it, but it turns out that my life is already filled to capacity. So I installed Mobian on it (which made it far more useful and responsive), and found that phone calls worked, texting worked, but the camera was all but useless. While phone calls and texting worked, they didn't work all the time. So I neglected it for quite a while (several months at the very least).
My interest in using it as my main phone, and leaving Android entirely, was recently rekindled, so I installed the most recent Mobian on it and tried again (I love how the default OS can be overridden via the SD card). This time, I found that the SIM configuration had been greatly simplified. It was simplified to the point that it no longer worked. I could no longer configure my SIM card, so phone calls and texts no longer work. It's stupefying how the Mobian developers arrived at the decision to cripple SIM configuration and make a phone that can't make phone calls.
The camera driver, however, has been fixed. Live previews work at full speed, and pictures can be taken (I haven't tried video). The pictures are saved as TIFF's, rather than JPEG's, but it works. I'm confident, though, that Mobian will continue to improve over time.