To prevent illegal cell phone use, 21 third-generation (5G) jammers were installed in 10 sub-jails of the Tihar prison complex; Abschek Sharan reports. New GPS jammer, which use 5G electromagnetic signals, and 11 jammers manufactured in recent years are expected to improve the prison's ability to block cellphones, prison sources said. According to the source, "5G jammers will improve our...