Prisons are one of the most dangerous places in the US, and having a cell phone in a cell does not make it safe. It can even lead to a break-in. In this case, cell phone jammers can help reduce the risks of prison inmates communicating with the outside world and committing crimes. According to the Department of Justice, mobile...

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Cell phone jammers have become a hot topic in the prison world. They have been used to block cell phone signals, but are they effective? A recent story reported by a news channel in a state revealed a man who reportedly used a cell phone jammer on a bus. He called people using cell phones on buses rude and annoying....