Chart: Six years after iPhone, data revenue overtook voiceNote the entry for 2007: "iPhone launches, the world changes."
<p>FORTUNE -- The point in the attached chart -- at Q4 2013 -- where the rising blue tide touches the fading brown line represents a milestone in the history of telephony, according to mobile analyst Chetan Sharma. That's when mobile carriers started making more money moving customers' data than they made selling voice-calling plans.</p>
<p>Sharma predicts that the U.S. this year will
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Chart: Six years after iPhone, data revenue overtook voice
