As the name suggests, these GSM jammer frequencies and blocking phones were born to prevent the magnetic radius of the signal from reaching a specific mobile phone number and to connect the interference signal to that mobile phone number. Due to this feature of mobile device blocking programs and mobile explosives, some mobile phone numbers have disappeared from all available networks. This happens because the gsm interferes with or prevents the function of the signal. These devices can continue to function as long as someone needs them. During this period, the caller cannot receive a mobile phone number. They use personalized messages and cannot use mobile phone numbers.
In order to interfere with the phone, you need a device that can transmit at the correct frequency. Although different cellular systems process signals in different ways, all cell phone networks use radio signals that can interfere. GSM for PCS and digital cellular systems operates in the 900 MHz and 1800 MHz frequency bands in Europe and Asia and the 1900 MHz 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.