Thank you @joanstewart

I go to a very remote area of Zambia a couple of times a year. Most of the area is a game park and the people live the same way they did a 100 years ago. However, many will visit towns to work for short periods, especially during times of drought. As a result, a surprising number of people own cell phones even though they live in an area with no signal. And I mean no signal.

Something surprising happens during the nights. There are spots where the signal will come through. I do not understand why but somewhere during the night your cellphone will start beeping if you are in the right spot. These spots are identified by trees and locals will hang their phones in such a tree to check them for messages whenever they pass the tree.

I'll never forget my surprise the first time we encountered a cell phone tree with cell phones hanging in it like fruit.

from Kryptonia