How widespread is smartphone theft?

I live in a very small town, so I know that my experience isn’t the same as someone in LA or New York, but I actually don’t know anyone that has had a smartphone stolen. I still support having a kill switch, just out of common sense. Nationwide In the US, how big of a problem is smartphone theft? Anyone know the numbers?

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Story added 21. May 2014, content source with full text you can find at link above.