Some mobile bands are as low as 600 MHz, which propagates quite well. The reason mobile phone signals don't travel so far are usually ground obstructions (inclu

Some mobile bands are as low as 600 MHz, which propagates quite well. The reason mobile phone signals don't travel so far are usually ground obstructions (including the horizon) and a relatively weak max power output (23 dBm probably? At least that's what the modems we use in our private LTE network in Greenland do...) The max power output is regulatory, but also for power reasons.