Recently, when I went to the school library, a very strange thing happened. My mobile phone had almost no signal, and I missed a few calls from friends. When I walked out of the library, the mobile phone signal recovered. Normal, what is the reason for this?
Jammer-MartDecember 2019
According to my analysis, your school library is likely to have a wifi jammer. As far as I know, many school libraries are equipped with this mobile phone signal jammer device to prevent the quietness of the library from being disturbed, such as sudden ringtones and mobile phone calls.
According to my analysis, your school library is likely to have a wifi jammer. As far as I know, many school libraries are equipped with this mobile phone signal jammer device to prevent the quietness of the library from being disturbed, such as sudden ringtones and mobile phone calls.