A phone jammer is a simple device that is used to prevent the transmission of mobile signals to the cell phones, hereby blocking all the calls. There are chances when we come across people who do not follow the cell phone etiquettes and talk on phones in public places such as churches, libraries and theatres. This is where the need of a phone jammer comes in. cell phones are just like the two-way radios and likewise, it is possible to block the signals coming to the phone. This can be done using a gsm jammer.
The first use of the cell phone jammers was done by the military forces in order to disrupt the calls between terrorists and other criminals. A cellphone jammer has now become a necessity to make a society cultured. There are places like hospitals and movie theatres that need silence. To maintain the decorum of these places, the institutions are installing phone jammers. The size of these jammers can vary from a portable pocket sized one to a bigger one used to jam a bigger area. A cell phone blocker will not just block the gsm and other network signals but also the internet usage and Bluetooth connections.
Schools and colleges use these devices to prevent students from SMSing each other while the class is going on. You can buy the jammers of different ranges starting from 10 meters to even 100 meters. The strength of the a gsm jammer is very good and it will also work even when there are walls in between. The size of the jammers is also one of the reasons why they can be used so easily. Some of the gsm jammers are look-alikes of cell phones. You can easily fit in a jammer in a cigarette package or n your pocket. Larger the size, bigger will be the area it would cover.
There are three antennas in a mobile jammer and they cover DCS, 3G and GSM networks. The main work of a cellphone jammer is to send out a wave bubble or a white noise signal. Just like your cellphone, you will have to charge the portable cell phone jammer for at least an hour. The jammer will then have to be plugged in so that it can be turned on. This will block all the cell phone signals and all the calls made and received by the phones will be lost. It is seen that some of the cell phones search the signals. This is just an indication of the fact that they do not have a signal. Switching off the jammer will bring the signals to normal.
Jammers are considered to be illegal as their misuse is easy. The jammers may prevent people from making emergency calls as well. A cell phone signal jammer will prove to be a hurdle in the public airwaves and thus the rights of the people to use their cellphones will be infringed. The worst part of usage of the jammers is that it also interferes with the working of pacemakers in the hearts of some patients.