I have Sailfish OS, just got the new Jolla Phone and I am quite happy with it. Surprisingly daily driveable for my requirements. My phone isn't a tiny laptop. Mic, IEM and camera work without issues. So does 4G VoLTE.

I know, its controversial for having some closed source UI parts (that are the reason why it doesn't feel like a tiny laptop) but the Linux/GNU underneath is open source. To those who are not requiring 100% FOSS purity it is an interesting choice.