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A new study from a firm called NQ Mobile says instances of evil software showing up in mobile phones were up 163 percent last year. - 

A new study from a firm called NQ Mobile says instances of malware showing up in mobile phones were up 163 percent last year. It's particularly a problem in Russia, China, and India, but malware by phone went up nearly 10 percent in the U.S.

Lindsey Turrentine, editor-in-chief of CNET Reviews, joins Marketplace Tech host David Brancaccio to explain.

Follow David Brancaccio at @DavidBrancaccio