I was under the impression that a company (AT&T) owns the tower, and they can lease out connections from that tower to other providers. They are also required by law to route 911 calls for free, but I can see a scenario if they botched the routing where 911 would not be accessible from that tower.
I was under the impression that a company (AT&T) owns the tower, and they can lease out connections from that tower to other providers. They are also required by law to route 911 calls for free, but I can see a scenario if they botched the routing where 911 would not be accessible from that tower.