Knowledge: the signal is actually encrypted transmission of electromagnetic waves, the signal peaks and troughs on behalf of 1,0. cell phone jammer play a superposition of waves, resulting in the shielding effect.
The Federal Communication Commission of United States, outlawed the use and sale of cell phone jammers.
We have regular contact with mobile phone jammer in the army, in order to prevent the phone bomb attacks, it is necessary.
It is illegal for any US citizen to use or sell a cell phone jammer
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