Fifteen new jammers will be installed at six new locations to block 4G signals, effectively preventing the inmates from using mobile phones from inside the jail by Asia’s largest prison Tihar.

Inexpensive jammers can block 4G-LTE across entire cities By Rick Burgess November 15, 2012, 15:30 18 comments. Serving tech enthusiasts for over 25 years.

Key security enhancements directed during the meeting included: Installation of 4G and 5G jammers in jails. Provision of walkie-talkies for staff.