Mobile phone jammers are electronic devices that block cell phone signals within a specific radius, preventing phones from receiving or transmitting signals. They were originally used in the defense sector but are now common in places like restaurants, hospitals and movie theaters to prevent disturbances. The jammer works by transmitting the same radio frequency as cell phones, interrupting the connection between phones and mobile towers. This makes the phones appear unreachable or out of range. While jammers vary in size and range, they provide a solution for maintaining privacy and reducing inconveniences caused by cell phone use in public spaces.

1. Mobile Phone Jammer - Technocrats
Latest Invention For Blocking Call
Signals
The world is fast becoming tech-savvy due to heavy use & influence of modern gadgets such as laptops,
mobile phones, DVD players & digital cameras on human life. Without them our lives will come to a
stand still. Though these sophisticated electronics have made our job a lot easier but at times their
negative features come to our notice. Most of us might have gone through an embarrassing situation of
getting disturbed by a cell phone ring while we were busy attending important seminars, interviews or
negotiating with clients. A single cell phone ring will spoil the entire spirit & make us feel irritated. Even
some of us are seen to stop using mobile phones for temporary period. But this is not the right solution
as it might result in missing out our emergency calls. Therefore technocrats have invented an innovative
device called mobile phone jammer that helps us continue with our important assignment without
getting disturbed by cell phone signal jammer.
It is true that mobile phones are important communication tools but their wide scale use in places like
churches, hospitals, libraries, mosques, restaurants, movie theaters, concerts & shopping malls have
caused great inconvenience to the people present around. And phone jammer has brought effective
solution to this problem. In earlier times, the use of jammers was limited in the defense sector but later
it sneaked into normal people's life. Now the mobile phone jammer is found to be used everywhere
starting from prisons & dentition centers to restaurants for maintaining security as well as privacy. With
the installation of cell phone jammers, people don't have to either switch off or keep their mobile
phones in silent mode.
A cell phone jammer is an electronic device which is capable of blocking cell phone signal within a
specific radius. Within this range, no cell phone will be able to either receive or transmit the signal. It
works on the basis of same technology used for disrupting any other kind of radio communication. A
mobile phone operates by establishing its contact with the service network through mobile towers
present in different areas. These towers help catch the signal which continues to change with a change
in the location of user. The phone jammer intervenes by transmitting the same radio frequency as that
of the phone & break up the contact between the mobile phone & tower. As a result the cell phone
loses its work ability. Many types of phone jammers are there whose operational area is limited to a
certain range. While some of them are found to be of room size with few hundred meters range, others
are like small suitcase with few meters range. However, the price of jammers used to vary a lot.
Since the mobile phones transmit different frequencies for talking & listening, the cell phone jammer
takes extra burden of jamming both types of signals so as to interrupt the communication successfully.
Even when only one frequency gets blocked by the jammer, the cell phone is made to think that it is
unable to catch the frequency of that of the service provider & is said to be unreachable or out of range.