I wanted a FairPhone, but they have yet to sell officially in the US and I couldn't afford to deal with the potential difficulties involved with not having the right bands.
To me its a no brainer for them to start selling in the US. Brands like Framework are getting a lot of hype for their reparability and longevity. Being a mobile brand stepping in to offer a smartphone to compliment Framework's laptops could be fantastic. Plus there's a wave of people demanding right to repair legislation in the US, Fairphone would do well to harness that I think.
My ultimate phone would be a fairphone with audio jack, fingerprint reader, sd slot, and support for custom roms like calyxos. I would buy that in an instant.
Again, Fairphone 3 ticks all those boxes. Though I'm not 100% about Calyxos. I know it can run LineageOS or /e/OS instead of stock android. If it can run those, its likely that it can do Calyxos too.
We are talking about fairphone 3 though? And fairphone 5 has really shit battery life, no headphone jack and a mediocre at best camera for it's price point.