Yes, running OnePlus 6 with Mobile NixOS (actually mostly just NixOS with a couple modules from mobile NixOS). I will try to make the config public when I get it into a less rough state. It's... useable as a daily phone, but you have to be really into it to do it.

It's not like desktop Linux where if you're a tech enthusiast you can ignore a few rough edges and just use it like you would a more mainstream OS.

I had to flash a specific old version of OxygenOS, using almost undocumented tools, which could easily brick the phone if something went wrong, just for GPS to work. I have to recompile my kernel every time it updates. I had to write my own scripts for the hardware slider thing to work (which has a nice benefit of letting me use it for whatever I want; I want to make it switch between NORMAL and INSERT in my editor just as a laugh).