Cell phone jammers block all cell phone signals

We have CDMA DCS PCS GSM 3G 4G cell phone signal jammer. These portable cell phone jammers are relatively small and easy to use. Once activated, it disables all phones, wireless LAN and WiFi within a 20 meter radius. The frequency range covered by cell phone jammers is CDMA/GSM(850-960MHz), DCS/PCS(1805-1880MHz), 3G(2110-2170MHz), GPS(1570-1610MHz), WiFi(2400-2485MHz), LOJACK(168 -178MHZ), 4GLTE (2620-2690MHZ or 2300-2400MHZ) and 4G (790-862MHZ or 720-790MHZ) covering all mentioned phones.

A friend of ours told us he runs a library and people like it because of the quiet environment. But things changed after the teens came in, who were always talking loudly on their phones. Many customers have complained about this. What can he do? He asked what should I do? In this case, I told him he needed a cell phone jammer. Since Kuyou used the mobile phone jammer, Ku has remained calm and no longer received customer complaints. very happy. A cell phone jammer is a device used to block cell phone signals in a certain area. When the phone is turned on, the phone in the area cannot send or receive any signal from the base station.