Why use mobile phone signal jammer in prisons?
From a disciplinary perspective, is necessary to use a cell phone jammer. As more and more prisoners secretly use of mobile phones, the head of the prison had to consider the use of this equipment. From the point of view of the FCC, however, it doesn't think so. The FCC does not advocate the use of this equipment. But considering the actual situation, sometimes have to use this kind of equipment
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