Why can the wireless signal jammer interfere with the normal use of the phone? Mobile phones work by receiving and transmitting radio waves. The frequency of the phone is about 1.8GHz. To interfere with cell phone signals, you must have a device that emits the same frequency of radio waves. Cell phone signal jammer is such a device, it will block the mobile phone signal within the scope, the degree of light will seriously affect the call and the quality of the Internet. Generally within a radius of 25 meters, the phone will be strongly disturbed by the jammer. The effective range of 25 meters will also be affected less. The scope of the jammer will also change due to the specific performance and power of each jammer.
The portable jammer’s role is to interrupt the communication link (or network) between two (or more) “partners”, when they are trying to talk with each other or deliver certain data between them. Jamming the communication link between a Drone and its Operator is a specific case out of many more; we can try to jam the communication between a cellular and the base station, between two tactical radios, between a bomb and a remote control that is used to activate it, etc.
In a press conference on Monday, Stirling said the altercation appeared to stem from gang-related conflict over territory, contraband and cell phones. Stirling said investigators believe cell phones were used by prisoners to communicate about the riot between dorms.Russia’s Rossiyskaya Gazeta daily cited military experts as saying that the Rychag-AV jammers added significantly to reducing the effectiveness of the US air strike on Syria’s Ash Sha’irat airbase in April 2017.
In Russia a lot of the examination room of the university, students through the way of receiving SMS illegally obtaining answers, or simply by taking textbook will answer his accomplices in the examination room the right hand side via their mobile phones to read to them. University teachers in Russia say the practice of simply telling students to turn off their phones or to frisk them before they enter the exam has not worked. As such problems become more serious, some of Russia’s higher education institutions have had to turn to the high-tech equipment developed by the elite of the country’s big military companies.