Now that everyone is talking about the iPhone, we should look back at the evolution of the mobile phone.
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This is the first "mobile" telephone in use in the early 1920s.
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The next innovation was the car radio-telephone in the 1950s.
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Then the brick phones of the 1980s.
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The Motorola Startac was the first popular flip-phone. It suddenly made anyone using a brick look terribly old-fashioned.
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Now the iPhone.