For what purpose do people start using cell phone jammers
Exactly what the purpose of people started using cell phone jammer, different people can give you different answers. Have for protection purposes, some for academic purposes, and will use this kind of equipment to improve work efficiency. Although for different purposes, but the demand for this type of equipment is growing.
Commercial cell phone jammers block frequencies between 800 MHz and 1900 MHz within a range of 30 feet and can be used discreetly in a pocket or purse to block all cell phones in a small area.
There are rumors that some academic institutions are seeking permission to block cellphone transmissions due to "academic dishonesty". One could easily use one of these cell phone jamming devices in a public space like an internet cafe.
Apart from acting as an effective tool to combat cheating in exams, these devices can protect one against various security threats and criminal activities. This device adds an extra layer of security for both domestic and overseas delegates; prove useful in maintaining silence in lectures and seminars; preventing detainees from maintaining contact with the outside world; and for many of these activities.
A mobile jamming circuit or a mobile phone jamming circuit is an instrument or device that can prevent the reception of signals by mobile phones. Basically, a mobile jammer circuit is an RF transmitter, which broadcasts radio signals in the same (or similar) frequency range of GSM communication.
A jammer can block all radio communications on any device operating on radio frequencies within its range (i.e. within a certain radius of the jammer) by emitting radio waves that prevent the targeted device from establishing or maintain a connection.
For example, jammers can block your cell phone from making or receiving calls, texts, and emails; prevent your Wi-Fi enabled device from connecting to the Internet; prevent your GPS device from receiving correct positioning signals; and prevent a first responder from locating you in an emergency.
The Israel Prisons Authority said it installed the jammer to prevent phone calls being made from smuggled mobile devices, saying they posed a security threat. He had no further comment.
Police also frequently block cell phones when conducting major raids on organized crime networks. Companies also use jammers to stop corporate espionage by blocking voice transmissions and photo transmissions from camera phones.
