Professional mobile phone jammer devices were originally developed for law enforcement and the military to disrupt communication between criminals and terrorists.The bombings that took place in Bali in October 2002, the bombings that took place in Jakarta in August 2003, and the commuter train bombings that took place in Spain in March 2004 all relied on mobile phones to detonate bombs. In December 2003, one mobile phone jammer thwarted the assassination attempt of Pakistani President Pervez Musharraf. According to reports, during President Bush’s visit to London in November 2004, British police considered using interferences to protect the president’s team in London.
Today, there are three most common places use cell phone blockers: Cinema use portable cell phone signal blockers to keep the place quiet so people can fully devote themselves to the movie; Workplace use cell jammers to improve the efficiency of employees; Examination rooms use cell phone scrambler to prevents candidates from cheating and guarantees fair and equitable examinations.
1. How cell phone jammers work
The main principle of the mobile phone jammer is to emit huge noise in the frequency band used by the mobile phone, which interferes with the reception and transmission of the normal signal of the mobile phone. This small object is not only often used to prevent cheating in exams, but is also used politically and militarily to prevent terrorist attacks.
2. Where we can use the jammer
Cell phone signal jammers are mainly used in various test venues, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, government, finance, prisons, public security, military heavy places and other places where mobile phones are prohibited.