I'm abundantly aware of sites on which to check the bands - I've also used https://www.kimovil.com/en/frequency-checker/US/fairphone-4 https://www.kimovil.com/e

I'm abundantly aware of sites on which to check the bands - I've also used https://www.kimovil.com/en/frequency-checker/US/fairphone-4 https://www.kimovil.com/en/frequency-checker/US/fairphone-4 in the past. I'm not claiming it's unknowable, I'm claiming it's often known to be terrible. Purism, PinePhone Pro, Fairphone, Sony Xperia, Nokia 8.3 One, and other desirable phones support maybe half of the bands I need!