Mass use of signal jamming devices in prisons across the United States

As we all know, the criminal is not allowed using the mobile phone in the prison or in the detention center. Actually, there are many prison of all over the world have the problem that is they can’t forbid the mobile was used in the prison totally. There are also a few criminals contact with outside by the mobile phone secretly that they still do some crime. Just like this phenomenon was exist for many years. How to solve this difficult issue, the answer will be have to install one cell phone jammer in the prison.

The device is a good way to prevent criminals from secretly using their phones in prison, because once the device is turned on, the surrounding signal will disappear. Can effectively prevent prisoners from communicating with the outside world.