UBS is counting down to July’s US semiquincentennial with a series of reports exploring 250 years of uniquely American innovation. This week, UBS’s Kevin Dennean discusses the rise and impact of the smartphone.

<p>UBS is counting down to July&rsquo;s US semiquincentennial with a series of reports exploring 250 years of uniquely American innovation. This week, UBS&rsquo;s Kevin Dennean discusses the rise and impact of the smartphone.</p>

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