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Cell phone jammer is mainly equipment requires shielded 2G 3G 4G signal, it acts as a technical means, which has been present in the current society, many people use such devices.
Hand-held cell phone signal jammer are very convenient tool to prevent boredom ringtones, reduce unnecessary upset.
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.
Experts said the test group, GPS satellite navigation product problems than expected, especially not accurate navigation serious problem. The GPS jammer emergence of a more deepened the occurrence of such events.
mobile phone jammer used in schools should be legalized because it can contribute to student learning and exam fairness.