The signal in the library became very weak

  • MarthaMorton
    Recently, a very strange thing happened to me when I went to the school library, my mobile phone had almost no signal in the library, and I missed several calls from my friends. What's the reason?
  • PerfectjammerPerfectjammer
    According to my analysis, it is most likely that your school library is equipped with cell phone jammer. As far as I know, many school libraries are equipped with such devices to prevent any disturbance of quiet in the library
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