Unlike cell phone jammer signal transmitter, which is a waveform interference, wave superposition. In the design and use very professional.
It is illegal for any US citizen to use or sell a cell phone jammer
We do not know being followed in many cases, in order to prevent such incidents, GPS blocker have used as a guard against such incidents occur.
Exam in the use of cell phone signal jammer is a very normal thing, it is not bound by law to use such a shielding signal.
Four people underwent inquest proceedings at the Department of Justice (DOJ) for the sale of cellular phone jammers
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