Advanced jammers can interrupt many types of cell phone signals
As we all know, cell phones are becoming more and more an indispensable part of our lives. It will bring us comfort and negative consequences. In order to avoid such adverse effects, various types of cellular phone frequency jammers have appeared on the market. It can meet various needs, prevent cellphones from affecting our lives, and it is the best choice to ensure our cellphone usage efficiently. Since it can cut the cellphone's 3G 4G signal without your knowledge and many powerful mobile jammers can set one or more signals separately, it does not affect the use of other cellphone signals, which is very convenient.
Some simpler devices can only shield a range of frequencies, while advanced mobile jammers can shield multiple types of networks at once, disrupting the signals from dual-mode or triple-mode cell phones, making it impossible to switch between different networks. And find the opening signal. Some high-end jammers can block all frequencies at the same time, while other phone jammers can be set to block certain frequencies.
To interfere with cell phone signals, all you need is a device that can transmit on the correct frequency. Although different cellular systems process signals differently, they can block the radio signals used by cellular networks. The GSM networks used for digital and PCS cellular systems operate at 900 MHz and 1800 MHz in Europe and Asia and at 1900 MHz (sometimes 1.9 GHz) in the United States. The cell phone jamming device can transmit on any frequency and is effective for AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN and Nextel systems. Old-fashioned analog telephones are just as susceptible to interference as today's digital telephones.
GSM jammer's actual range depends on its strength and the local environment (such as slopes, walls, etc., which can block interfering signals). Low-powered jammers can block phone calls within about 9 meters. High powered equipment can turn the size of a soccer field into an area with no signal, and equipment used by law enforcement agencies can disrupt service within a mile.
