Exactly what people started using cell phone jammer, different people can give you different answers. For protection, have some for academic purposes and use this type of equipment to improve work efficiency. Although for different purposes, but the demand for this type of equipment is bigger and bigger.
The commercially available cell phone jammers block frequencies between 800 MHz and 1900 MHz in a range of 30 feet and can be carried discreetly in a pocket or handbag to block all cell phones in a small area.
It is rumored that some academic institutions are seeking authority to interfere with cell phone transmissions because of “academic dishonesty”. You could also use one of these devices to interfere with cell phones in a public space such as an internet café.
Not only are these devices an effective way to curb fraud during the investigation, they also protect against various security threats and criminal activity. This device provides domestic and foreign delegates with an additional level of security. prove useful to keep silence at conferences and seminars; Prevent prisoners from staying in touch with the outside world; and for many such activities.
A mobile jammer circuit or a cell phone jammer 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 that sends radio signals in the same (or similar) frequency range as the GSM communication.
A jammer can block all radio communication on any device that processes radio frequencies within its range (i.e., within a certain radius of the jammer) by transmitting radio frequency waves that prevent the target device from establishing or maintaining a connection.
For example, jammers can prevent your mobile phone from making or receiving calls, text messages, and emails. Prevent your Wi-Fi enabled device from connecting to the Internet. Prevent your GPS device from receiving correct position signals. and prevent a first aider from being able to locate you in an emergency.
The Israeli prison agency said it installed the jammer to prevent phone calls from smuggled mobile devices. They posed a security threat. There was no further comment.
The police also frequently jam cell phones when they conduct large-scale raids on organized crime rings. Businesses also use jammers to stop business spying by blocking voice and photo transmissions from camera phones.