CELL PHONE SIGNAL JAMMER is an instrument used to prevent cellular phones from receiving signals or transmitting signals to base stations.
Originally, Cellular jammers were designed to maintain cellular communication silence to block criminals from communicating to each other. Cellular Jammers were intended to deal with the nuisance levels stemming from the abuse of cellular phones in public places such as Educational Institutions, Concert Halls, Restaurants, Libraries, Religious Places, etc. Additional applications for security and protection involve blocking cellular communication in secure facilities and research centers, and also the management of cellular communications in restricted areas such as correctional facilities, army barracks, or government offices.
Cellular Jammers are used in any location where cell phone use is prohibited, unauthorized, or unwanted either due to location or event sensitivity. Examples include: hostage situations, law enforcement stake outs -- wherever one finds terrorist or illegal activities -- government offices, air and naval bases, military installations, and especially correctional facilities, where inmates are known to direct outside criminal operations via cell phones.