Looks great! For other T-Mobile users, it actually supports the full range of frequency bands. Quite a few devices claim T-Mobile support but are then missing band 12 or 71 on LTE or n71 on 5G, all of which are critical for coverage outside of cities.
The device claims AT&T and Verizon only, I’m curious about that…
To which device are you referring?
The Fairphone 6+ is compatible with AT&T and T-Mobile in the US and their MVNOs.
https://us.fairphone.com/carrier-compatibility
Oh this is weird. They have some contradicting information.
https://us.fairphone.com/the-fairphone-gen-6-plus
Click on “see all tech specs” and under “compatibility” it says AT&T and Verizon.
But it lacks Verizon’s primary band and clearly can’t be used with it.
Likely because Verizon will only let "certified by Verizon" devices on their network, while AT&T and T-Mo will let pretty much anything with an LTE modem connect.