

I don’t use Fairphone, but I am a bit of a mobile network nerd. I’m on US Mobile which is a unique MVNO that allows you to move between any 2 of the 3 US networks as you please. You have to have signal to initiate a network change and sometimes it takes a day, but for premium mobile service they’re great. I mostly just stay on ATT and T-Mobile, but depending on the rural area you visit Verizon and T-Mobile is also a reasonable combination. My point in the comment above is to not discount T-Mobile, their network capacity in cities and suburbs is miles ahead of Verizon and ATT (I’m ignoring UWB since it requires you to be outside and line of sight to a tower, it’s not practical for the vast majority of cell phone usage which occurs in a building).
The Fairphone is the only modern phone I know of that has limited bands, so you’ll need to use a T-Mobile based MVNO. The best deal on the T-Mobile network is Mint Mobile, providing 1yr of unlimited service for $180 if you port in a number. They’re directly owned by T-Mobile and I used them for several years quite happily before switching to US mobile. Google Fi also occasionally runs promos bringing their plans into the $15/mo range. The only reason I’m not still on them is the requirement to port in a number to get that $15/mo price for a year. I tend to change network every single year to always get the best deal.
The absolute best phone plan deal recently is the Total Wireless $20/mo 5g BYO plan. Uniquely the price is guaranteed for 5yr and it includes unlimited priority data + 10GB international roaming every month. But it’s on Verizon’s network.

They’re going to need to drastically change how the platform looks if they want to succeed. In typical Chinese app fashion the UI is incredibly bloated and overwhelming, not what a Western audience wants at all. They also won’t be able to match YouTube’s CPM so creators won’t bother switching either.