Re: > "selling point of 4G was greater range/capacity" - not around here
As the frequency goes up, signal reception will get worse, because as the wave length gets shorter, so does the size of obstacles, it can get past, gets smaller, so more cell nodes are required.
Short Wave AM Radio can travel huge distances because it has a long enough wavelength to get past most obstacles, and can bounce off the ionosphere; the same is unfortunately the case for 50Hz and 60Hz mains power!
Biting the hand that feeds IT
