With the increasing popularity of mobile communications, GSM signal jammers in performance halls have become a controversial topic.cell phone jammer Although this technical device can block mobile phone signals in a specific area, thus ensuring that the audience is not disturbed, its legality and morality have sparked widespread discussion. In particular, after France authorized the use of GSM jammers in theaters in October 2004, this decision caused different reactions in European countries.GPS jammer

　　Function and legal background of jammers

　　A jammer, also known as a "signal blocker", is a device that uses radio frequency interference to block mobile phone signals in a specific area. Wifi jammer This device can effectively prevent mobile phones from making calls in places such as theaters or cinemas, thereby avoiding disturbing other audiences' viewing experience. However, according to Article L 39-1 of the French Postal and Electronic Communications Code (CPCE), the use, sale and installation of jammers are prohibited in principle, and violators will face 6 months in prison and a fine of 30,000 euros.

　　However, there are exceptions to the law. On October 8, 2004, France issued a decree allowing the use of GSM jammers in theaters under certain conditions. This decision was intended to ensure that audiences could enjoy performances without interference from mobile phones, but this move has also caused a lot of controversy.

　　Legal exceptions and technical conflicts

　　Although the French government intended this decree to improve the experience of theatergoers, it also conflicted with the responsibilities of mobile operators. In particular, the risk of mobile phones not being able to connect to emergency calls when an emergency occurs makes this measure questionable. According to Article L 33-3 2° of the CPCE, performance halls can install GSM jammers, which makes performance venues an exception in the law. However, GSM jammers in performance halls may violate the basic principle of the free flow of communication services.

　　In addition, the implementation of this decree has been delayed for three years because it involves technical regulations at the European level. Therefore, it needs to go through a three-step approval process: first, consultation at the European level, then a decision by the French Electronic Communications Authority (ART), and finally an approval order from the Minister of Industry.