The Pinephone seems good as far as being mostly open, cheap, physical switches but... I guess the modem is not open. Anyway have I personally tested that the switches actually work/no soft switch somewhere no... I'm mostly after the potential emerging market (apps) over privacy.
I have a KDE edition Pinephone that I intend to use more overtime but primarily an Android user.
Also I get super annoyed when Android bundles stuff on your phone. I realize you can get rid of it/the cheap phone has to get paid somehow... but like having notifications that you can't slide away... things like that. Want more control over I realize Linux phones are lacking in software, pretty bad... Plasma looked really nice, Phosh not so nice (home screen) but it works out of the box though particularly detecting external screens. Anyway I'm looking forward to it improving over time, a cheap Samsung Dex-like experience is my desire.