With nearly six in 10 Android phones running an insecure version of the operating system, it makes sense that Bit9's 2011 list of the 12 riskiest smartphones are powered by Google's OS. Android's security problems are primarily caused by phone manufacturers releasing products with outdated versions of Android, and then releasing upgrades at a glacial pace. As a result, consumers storing personal information on the phones face serious security threats, the vendor says. What follows are Bit9's "Dirty Dozen."

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