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by bigiain 2999 days ago
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

(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...)