The world passed its four billionth mobile connection this week, passing another milestone along the road to the ubiquitous wireless connectivity of every human being. It took 23 years for one billion mobiles to be connected, three years for the next billion, two years for the next billion and less then two years to reach four billion. Further growth in emerging markets plus the integration of previously unconnected devices are expected to push the number of global connections to six billion in 2013. There are only 6.7 billion human beings.
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