I think I found the source code/bootloader for the PVG100. After a whole lot of digging, I now have this .zip from the founder himself, and it is for the original 2018 firmware, not with any of the updates. I'll put the link to it below.
I am definitely a novice tinkerer, not a developer. I don't have any of the skills or tools to make a custom ROM, though I very much want one to remove the bloatware and enable hotspot tethering etc. Stormskeeker, could you please post whatever you have managed to find so far, or explain how you have been able to tweak it?
I also have a couple of these that are inoperable for various reasons that I have thoroughly dissected. So if anyone needs to buy any of my spare parts, or wants to just know more about the Palm's guts, then hit me up!
This is SUCH a rad little phone. Biggest complaint by far is battery life, and I would LOVE if someone help me figure out how to power this phone with a bigger battery. I found a Oneplus battery has the same connector, but it won't work when I connect it (unless it's plugged in to a wall adapter)... does this have something to do with the firmware not accepting a different battery? Does Anyone know how I can get around this??