There are at least 19 bogus cellphone towers operating across the United States that could be used to spy upon, and even hijack, passing mobile phones.

So says Les Goldsmith, head of ESD America, a company that imports and sells tightly secured mobile phones that can detect "baseband" hacking attempts. Goldsmith calls fake cell towers "interceptors."

"Interceptor use in the U.S. is much higher than people had anticipated," Goldsmith told Popular Science in a piece posted online last week. "One of our customers took a road trip from Florida to North Carolina, and he found eight different interceptors on that trip."
Cell Phone
Phil Campbell/Flickr
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