Richard Taylor
BBC
May 3, 2014
As popular as chat apps have become, they all suffer from the same flaw – if you board an underground train, head into the wild or find yourself in a situation where the authorities block the mobile networks, you’re likely to end up cut off.
Now a new technology is promising to keep such “off-the-grid” smartphone owners chatting.
It has been hailed as having the potential to trigger nothing less than a second mobile revolution.
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