As we all know, cell phones are increasingly becoming an indispensable part of our life. It can bring us convenience and negative consequences. In order to avoid such unwanted effects, various types of mobile phone signal jammers have appeared on the market. It can meet different requirements, prevent mobile phones from affecting our lives, and is the best choice to protect our efficient use of mobile phones. Since it can cut off the 3G 4G signal of the mobile phone without your knowledge, and many strong mobile jammers can set one or more signals separately, it will not affect the use of other mobile signals, which is very convenient.
Some simpler devices can only block a set of frequencies, while advanced cell phone jammer can block multiple types of networks at the same time, cutting off the signal of dual-mode or triple-mode phones, making it impossible to switch between different networks. and find an opening signal. Some high-end jammers can block all frequencies at the same time, while other phone jammers can be set to block specific frequencies.
To interfere with the cell phone signal, all you need is a device capable of broadcasting at the correct frequency. Although different cellular systems process signals in different ways, they can block the radio signals used by mobile phone networks. GSM networks used in digital and PCS cellular systems operate at 900 MHz and 1800 MHz in Europe and Asia, and 1900 MHz (sometimes 1.9 GHz) in the United States. The jammer can broadcast on any frequency and is effective for AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN and Nextel systems. Old-fashioned analog phones are just as susceptible to interference as today’s digital phones.
The actual range of the GSM jammer is related to its power and its local environment (eg slopes, walls, etc. which may block the jamming signal). Low-power jammers can block phone calls within a radius of up to 30 feet. High-powered equipment can turn the size of a football field into a signal-less area, and equipment used by law enforcement can cut services within a mile radius.