[tristanj]

The Fairphone 5 is only IP55 rated (dust protected, and water droplet resistant). Most flagship phones are IP68 rated (fully dust sealed, and water submersible). IP68 phones are sealed with a single-use adhesive gasket, and replacing battery requires breaking (and replacing) this seal. If the seal is improperly applied, the phone is no longer protected from dust or water.

[Aachen]

There is also a middle ground of IP67 from the Samsung Galaxy S5. I'm personally fine with the Fairphone level (they clearly prioritise easy and frequent disassembly; that's their entire brand) but for someone who wants to be able to submerge it just below the surface and walk through pouring rain for hours, that would be enough