Problems such as privacy invasion, academic cheating or even industrial espionage have been raised as cellphone use has skyrocketed. A small but growing band of people is turning to a blunt countermeasure: the mobile phone jammer, a gadget that renders nearby mobile devices impotent.
Since the birth of cell phone jammer, it is apparently doomed to be marked with illegal. The sale and use of jammers are outlawed in most of countries overall the world because it interferes with the emergency communication. Anyone who use, sell or distribute jammers could be fine up to $11,000 for a first offense in the United States. The jamming gadget is routinely used by military, jail, police station to control or disrupt communication during hostage situations and bomb threats.
Banning the sale and civilian use of cell phone jammer has its reasons. You can not make the emergency call because of someones jammer blocking. For example, jammer could be used by criminals to stop people from communicating in an emergency. France once legalized cell-phone jammers in (movie) theaters and other places in 2004 but then abandoned due to complaints regarding emergency calls.
However, jammers can also used for good. Gas stations are sparkled and exploded as the drivers use their cell phones when they refuel for their car. How terrible it is? People always oversee the warnings posted in the sensitive places. Some countries petroleum and petrochemical companies have equipped cell phone jammers in gas stations. The electromagnetic signal cell phone jammer sends is always in the static state and will not communicate with other signal sources, which means it does not interfere with other electronic devices and has no harm for human being.
The demanding for jammers is rising. Owners of cafes and hair salons, hoteliers, public speakers, theater operators, bus drivers and, increasingly, commuters on public transportation use jammers to force employees to focus on customers rather than their cell phones. Someone says jamming is necessary to do his job effectively. Can you bear you are interrupted by someone who are talking about sexual abuse when your session? Its fun to watch the kids try to get a signal when they hide low in the seats and use their phones.
Nowadays jammers come in a variety of shapes and sizes including cellphone-sized models. The palm sized jammers are easy for you to carry around or slip into your coat pocket. Have you ever experienced that someone especially girl was blabbing away into her phone when you were trying to enjoy a movie, meal at a restaurant, or a nice quiet nap one the commuter bus/train? So the next time, you can reach into you backpack and get some quiet on the train with your jammer.
Although government forbids the use and sale of jammers, these kinds of devices are finding a market. Someday when jammers are used more judiciously, governments relax their restriction and prohibition on jammers, and they are allowed to be used in churches, cinemas, theatres and counthouses, we will be able to enjoy peace and quiet at restaurants, cinemas or the commuter train or bus.