Possible. All I know is calling 911 on my phone with cell only failed mid morning yesterday EST while I had no service. My local news put out an announcement the 911 operators were having issues receiving calls due to issues with ATT.
Connecting to WiFi to call 911 failed. Again, could be my county. Called non emergency local number over WiFi: success. They transferred me to 911
A lot of plans do. Especially with the major telecom networks like ATT and Verizon.
Recently had a smaller company come in and install fiber. $85/mo for Gigabit service with no data cap. That’s pretty good compared to what I was paying. ATT only offered 500Mb/s and that was over $110 a month with a data cap, I want to say 800GB.
Do not get reliable enough cell coverage for one of those mobile routers. But they aren’t any cheaper here since those are owned by the major telecoms.