I don't actually have a cohesive/concrete idea per se, but I don't find myself disagreeing with any of that description :D TIL 3.5GHz is open. Where can I read

I don't actually have a cohesive/concrete idea per se, but I don't find myself disagreeing with any of that description :D TIL 3.5GHz is open. Where can I read more about it? It isn't in https://en.wikipedia.org/wiki/ISM_radio_band https://en.wikipedia.org/wiki/ISM_radio_band. Is it open worldwide? I'm in Australia (and generally interested in noodling over solutions that are region-agnostic). Edit: Ah TIL about CBRS from another comment (which I replied to, https://news.ycombinator.com/item?id=30490470 https://news.ycombinator.com/item?id=30490470). And thanks for the headsup about WiMAX, I was wondering what happened to it. The Wikipedia article on it made relatedness noises pointing at LTE, I get the impression it kinda ended up getting used for parts. (It's curious why stuff that seems to attract reasonable investment just doesn't take off, I wouldn't mind learning more, but yeah, idle curiosity.)