Please stop with water resistance nonsense. There were phones with headphone jacks that were waterproof.
Copying my reply to this same point from elsewhere:
Those phones were presumably glued together and not as repairable as the Fairphone is. Which is very useful, but does lower your waterproof rating, hence the need to compensate elsewhere.
I really feel like people are too quick to assume malice, generally. Often, there are just trade-offs with no clearly-right answer, and it’s not obvious to folks like us on the outside what those trade-offs are.
Galaxy S5 not only had a headphone jack and was water resistant but it had a removable battery as well.
Could you also replace the screen, camera’s, USB port, loudspeaker and earpiece with nothing but a screwdriver?
Ok, Fairphone lied I guess. You obviously no better than the manufacturers. It’s not like other phones with those jacks likely cost more to water proof those jacks or anything. Everything is always exactly the same and doesn’t cost extra to do anything differently.