A teacher told reporters that the school has installed jammers in the dormitory, which is an act of internal management and is a good thing. He said that most of the time is now on smartphones. Many students lie in bed all night and play all night. The next day’s courses are very boring and will affect their studies. After installing a cell phone jammer, students will no longer stay up late to make calls, and the next day will be better.
Each floor of the dormitory is equipped with landline phones. If parents or students need urgent contact, they can call the teacher’s phone. Regarding radiation issues, the school installed a public bidding document for mobile jammers, and all purchased products passed national quality inspections and met safety standards. The scope of impact is limited to the dormitory area and does not affect surrounding residents. In addition, a radiation test was conducted, and the results showed that the radiation is very low and does not affect health.
In prisons, cell phone jammers are also essential. Since 2005, authorities have confiscated more than 6,000 mobile phones in 55 prisons in North Carolina, including 443 this year. This number has been increasing steadily until 2012, when the authorities implemented airport-like entry and exit procedures in high-security prisons, such as metal detectors, X-ray scanners and well-trained dogs. Authorities said that after Jensen was kidnapped, a state law was passed that would make it a crime for prisoners to provide cell phones and also act as a deterrent.