35km - which is a TDMA timing issue, not a radio range one - that damned pesky speed of light problem... https://en.wikipedia.org/wiki/Timing_advance https://e

35km - which is a TDMA timing issue, not a radio range one - that damned pesky speed of light problem... https://en.wikipedia.org/wiki/Timing_advance https://en.wikipedia.org/wiki/Timing_advance (Note there's and "extended range" feature, where you can halve the cell site's capacity by waiting two timeslots in the TDMA schedule instead of one - which lets you go as far as 120km...)