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GSM is the Global System for Mobile Communications acronym, meaning global mobile communication system, is one of the world is major cellular systems. GSM Jammer is shielded equipment such signals.
Unlike cell phone jammer signal transmitter, which is a waveform interference, wave superposition. In the design and use very professional.
After I installed cell phone jammer in our office, basically to interview people say I do not need to turn off the phone again reminded.
Mobile phones have been around in society, when we need to use as much as possible considering the feelings of others, or is bound to cause unnecessary trouble. Using a Mobile phone jammer to some extent will solve such problems. Like bookstores, prisons, schools.
Cell phone signal jammer subject to legal restrictions in some countries, as security considerations, the illegal use of cell phone signal blocker might have 10 million dollars in penalties.