Has a Kickstarter campaign ever raised $4 billion? Because I suspect that's what it would take to begin building a network from scratch.
There are resellers that focus on data, however...Clear is one. They aren't great (they share the Sprint Network, which is very bad in some places, and fair to middling in most), and they reportedly throttle some high usage customers (I've not run into this, though the times when I've needed a lot of data, Clear couldn't provide it anyway, even without throttling), but they don't regulate what you run on the network. All my devices, including phone, connect through it when I'm on the road.