A cell phone blocker is an electronic device that blocks signal transmission between a cell phone and a base station. By using the same frequency as a mobile phone, cell phone jammers can cause strong interference between the caller and the receiver. It effectively blocks signal transmission from networks such as UMTS, 3G, CDMA, GSM, GPS, WIFI and PHS.
People rely on mobile phones for communication, including talking to friends, checking the Internet, and performing simple operations such as banking. Once they buy cell phone jammer for sale, their interference radius will be 5 to 10 meters. If the mobile phone is within the interference range, the mobile phone usually cannot send or receive the call unless the device is turned off, and other electronic devices in the area are not disturbed and work normally.
Purchase a mobile phone jammer that can run on multiple frequencies. High-tech cell phone jammers block many frequencies, but other jammers only block one frequency. If your phone can run on multiple frequencies, just use a different frequency to prevent interference. The latest research and development of 5G jammers on the market can not only block CDMA 3G 4G 5G mobile phone signals, but also cut off WiFi GPS signals.
4G networks have become popular in countries, so 4G jammers are popular in many countries, but different states and cities have different laws regarding the use of cell phone jammers. Some areas have strict restrictions on them, and some areas are only allowed to be used in certain places. The purchase must be guaranteed to be used legally and not for illegal purposes.