With the development of technology, which was previously expensive, cumbersome and limited to relocating cell phone jammer in the GSM 900 MHz band, it is getting smaller and cheaper. With regard to interference bands, they can not only block cell phone signals (GSM 3G 4G UMTS LTE, etc.), but also the location system and WLAN data networks (GPS, RLAN, WiMax, Galileo, etc.) become increasingly extensive.
In some parts of the European Union, the illegal use of cell phone jammers is prohibited. In the past, these devices were used to block cell phone calls from trains, theaters or cinemas. Nowadays, many illegal elements use a cell phone signal to interfere with criminal activities because it not only causes inconvenience to cell phone users, but also prevents emergency calls such as fire departments, police or ambulances wherever possible. Thieves are disabled The location of the vehicle steals cars or trucks that carry valuable cargo.
With the development of the GPS tracking system, more and more users of GPS trackers, the style is more diverse, because of its small design, low price, the naked eye is difficult to find, many criminals use it to track others others on Due to the high security risk, people with surveillance problems can use powerful cell phone jammers to stop GPS tracking.
Fleet management is increasingly using telematics systems that make daily work processes more data-oriented, including GPS location. The fleet manager uses a GPS tracker to monitor the presence of employees in the vehicle, display their location at all times and record all travel routes accurately. At this point, it is best not to damage the GPS, as this can lead to great difficulties in vehicle monitoring.
In special cases, such as in prisons, with authorities or with OFCOM’s approval, cell phone jammers can be used. FMG clearly stipulates that criminal authorities and police authorities can use signal tracing systems to prevent cell phone calls in their area, since criminals use cell phones to organize criminal activities such as drug trafficking, jailbreaking, etc. using cell phone interference in prisons. This can completely ve this situation