The interfering device transmits on the same radio frequency as the mobile phone and interrupts the communication between the mobile phone and the mobile phone base station in the city. This is called a denial of service attack. The jammer refuses to interfere with the use of the radio spectrum by mobile phone users within the range of the device. Sometimes older jammers are used. In order to interfere with the phone, all you need is a device that transmits at the correct frequency. Although different cellular systems handle signals differently, all cellular networks use radio signals that can be interrupted. GSM used in digital cellular and PCS-based systems operates on the 900 MHz and 1800 MHz frequency bands in Europe and Asia and the 1900 MHz (sometimes referred to as 1.9 GHz) frequency band in the United States. ). The jammer can transmit on any frequency and is effective for AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN and Nextel systems. Old-fashioned analog phones are equally susceptible to interference as today’s digital devices. Interrupting the phone is equivalent to interfering with another type of radio communication. Mobile phones communicate with their service network through base stations or base stations. Communication towers divide the city into small areas or units. When mobile phone users drive down the street, the signal passes from one tower to another.
In the wireless industry, some US wireless experts and officials (mobile cell phone jammer are also illegal) have stated that they worry that these devices will inevitably affect wireless devices used outside their designated areas. However, technology companies say that jammers are now advanced enough to be highly accurate, and can also be equipped with panels to divert jamming signals, otherwise these jamming signals may overflow outside the target area. According to the manufacturer, the jammer can only be set to the target frequency used by the phone, so laptops and other wireless devices such as BlackBerry (fancy pagers) will not be affected. Canada’s decision to allow cell phone jammers is the latest move to bring order to the wireless industry. The wireless industry is a technological frontier, and its popularity has surpassed the ability of regulators to control its use. It only applies to phones that only use analog or older digital cell phone standards. Newer models such as dual-band and triple-band jammers can block all widely used systems (AMPS, iDEN, GSM, etc.), and are very effective even for new phones that jump to different frequencies and systems under interference conditions. As the popular network technologies and frequencies used for mobile phones vary globally, some of them only work in certain regions (such as Europe or North America).