said by sonicmerlin:
Uh no, spectrum within a cell tower radius is finite. You can add as many cells as you want, and string up fiber to those cells as needed.
While that is true to an extent, most of the cell antennas are 200 to 400 feet above ground so one tower might overlap a dozen other towers over a 20 (or more) mile radius in terms of self-interference, even though the useful range to a cell phone might only be 5 miles.
So even though it seems like it would be an easy fix to just throw up a ton of towers, the reality is that it creates a nightmare of RF to deal with, and all of those towers are quite expensive.
I run into the same problems with my WISP. I have some areas with no service, and have had offers from landowners to build a tower to fill the gaps, but because all of my spectrum is already in use on surrounding towers, I can't put anything else up, even if I can afford the tower.
One option is to run fiber down a highway and put up a ton of small "towers" which are only 30 or 50 feet tall and sheltered by the surrounding trees or buildings, limiting the interaction with other towers. But then the problem becomes that every little hill, patch of trees, or cluster of buildings ends up creating dead zones all over the place. So while we end up with a high capacity system, the coverage ends up much more limited than fewer tall towers.