You know, I don't recall ever seeing 1 bar of signal strength on a smartphone. And once it's down to 2 bars, it barely works, if at all. Human brains: wow, what a bunch of suckers. Damn. By the way, is it legal to be deceptive in this way?
Our house is in kind of a hollow despite being in a city, and I (and guests - all networks seem just as bad) get one bar basically all the time at home. Phone calls are hit-and miss without WiFi calling switched on.
Looking at satellite view it is clear that the local municipal water tower is between a huge cell tower near the highway and my house. All carriers seem to lease that same tower only in my area.
It wasn’t like this when I moved in but I guess the carriers consolidated on that big tower near the highway about two years ago.
Radio shadows are a thing I guess.