Cell phone jammers (also known as “cell phone jammer” or “GSM jammers”) create artificial blind spots by blocking the connection between the phone and the network operator (or radio mast). The mobile phone no longer has a network within the interference range. The range of such equipment available to the public is 10 to 40 meters. For the military and government, there are even more powerful equipment with a range of up to several kilometers. Almost in most countries (such as prisons), the public sector uses this device.
Four mobile phones were even found in the “highest security” prison in Nabba. Police officials said: “It is surprising that four mobile phones were found in Nabuha Prison, which is the only highest security prison in Punjab.” Prison officials accused prison staff of lenient treatment. However, he added that prison officials are threatened by those who live and act under pressure. In the Patiala area alone, the police found 25 mobile phones from different prisons, but were unable to find out how these phones (some of which were high-end mobile jammer devices) landed from the prison. In order to stop the evacuation plan of the arrested Maoists, cell phone jammers will be installed in seven prisons in Chhattisgarh.