How to block cell phone signal in library

  • RalapBloomfield
    I'm a librarian. With the popularization of mobile phones, more and more people have mobile phones. More and more people answer the telephone in the library. The atmosphere in the library was seriously damaged. So I want to know how to block cell phone signals in the library
  • PerfectjammerPerfectjammer
    Hello, Ralap
    The easiest way to do this is to warn against using cell phone at the library. Of course, if this approach doesn't work, some coercive measures must be taken.
    A popular method is to set up a signal shielding system in the library. You can buy a cell phone signal jammer online to build the jamming system

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