@matrix You must not be in a particularly dense area. In philly at least a phone is likely to have quite a few towers they can directly ping at full power.
@freemo
It's probably because of the terrain. There are at least 3 cells right across the hill.
Yup, low frequencies will bend around smaller objects like buildings like they arent even there, higher frequencies are blocked trivially by even thin metal obstacles, etc.
Then of course if you get into 10Mhz and below you start getting ionosphere bounce and can go 10,000 km without batting an eye in the right conditions.