There sadly isn't a single viable option for a Linux mobile phone out there.
- Purism runs ancient hardware, charges way too much and has questionable business ethics.
- Pine64 has equally bad hardware but reasonable prices. I don't like the Hong-Kong connection though. Not sure how the security patching environment is in practice.
The only option on the table as I see it is buying from the devil and installing GrapheneOS.
FuriLabs has shipped a usable device for going on two hardware releases now.
Yes, it currently builds on top of Hallium. Anyone who thinks this should be a sticking point has their head in the sand; the device and effort is how you get a usable ecosystem rolling.