Hello Nora
That's a very good question. Now we are seeing more and more people using signal jammer . But why do they use this kind of equipment? According to the survey, there are basically three reasons for people to use signal jamming equipment:
1.In order not to be disturbed by others, create a quiet environment. For example, library, cinema, meeting room
2.These devices are used to avoid being tracked.
3.Some special agencies need to block cell phone signals. Prison, for example
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