Linux Phones

If you can afford it, I think the Librem 5 is the best linux-first phone at the moment. Both it and the PinePhone Pro are roughly as fast as each other, but the Librem 5 has a much more premium feel, and the hardware kill switches are much more accessible, if you're into that kind of thing.

Back in the day, when the Librem 5 was $1000+, it was a no-brainer for the PinePhone Pro, but I feel it is much more reasonable to recommend the Librem 5 now.

You can make it work as a daily driver, but I wouldn't want to depend on it for life and death situations. Calling generally doesn't work very well - either one side can't hear the other, or the audio quality is too quiet, or not very good. It's probably possible to fix if you know what you're doing, but I don't know what I'm doing :)

I carry around a dumbphone and a SIM removal tool, so that I can call someone if I really need to. If you're happy to do that, I feel it gives you the best of both worlds.

Otherwise, one alternative is to be an Android-first device, that has good support in PostmarketOS, e.g. the Oneplus 6/6T. Mobile Linux has had such an impact on these devices that the price of these on eBay has gone up in some areas over time :D

Good luck!