In many developing nations where they do not have an expensive hardwired telephone network, mobile phones are essential.
There aren't many places left in the world nowadays where you can't get a signal and one such place - 300 miles up the Amazon river in Brazil and deep in the heart of the rainforest - only recently got connected.
Dan Simmons reports on one of the last places on earth to get a phone signal.
Follow the Click team on Twitter
@BBCClick.
And join the conversation on
Google+
or
Facebook.
~RS~q~RS~~RS~z~RS~02~RS~)
Bookmark with:
What are these?
E-mail this to a friend