In Pictures: Why the Internet needs IPv6

Explosive growth of Internet users, devices, apps creates demand for more IP addresses

How many smartphones are in use?

With iPhone, Android and Blackberry devices all the rage, sales of smartphones are on the rise globally – but they still have a long way to go before they surpass sales of regular mobile phones. Smartphone sales reached 472 million in 2011, up 58% from 2012, according to Gartner. But smartphones continue to lag overall mobile phone sales, which Gartner says hit 1.8 billion. As of November 2011, smartphones accounted for just 27% of all mobile phones in use worldwide, according to a study by Vision Mobile.

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