By some estimates, the world has added one billion new wireless customers in just 18 months, for example.
Global average revenue per user will fall from U.S.$14.28 in 2009 to U.S.$11.38 in 2014, Yankee Group predicts.
As Microsoft retires Skype in favor of Teams, it might be useful to recall just how impactful “voice over IP” services such as Skype were i...
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