And even where there is coverage it frequently barely works. Many of the mountain areas around me have great signal strength but we're lucky to get 100KB/s download speed.
Now Norway is the size of about the California and probably easier to cover one could say but the population far less and I can’t imagine what the telcos bring in per user which doesn’t even even go towards their infrastructure.
US mobile and internet cover is crap and will need regulatory intervention if we want to get it in rural areas IMO.