Okay, so there's a high barrier to entry. It's pretty hard to become an ISP too. That doesn't make either a walled garden. It's not so much about whether I per

Okay, so there's a high barrier to entry. It's pretty hard to become an ISP too. That doesn't make either a walled garden. It's not so much about whether I personally could federate with the network, as it is about whether some reasonably large number of other entities could. I don't have exact numbers, but it seems there are 1000+ phone providers worldwide.