Initially, its were police and military forces who began using specific ware to block all the radio signals in certain territory to preclude adversaries from applying communication gadgets. The method of blocking the radio wave is much unsophisticated. Blocking equipment transmits radio signals of certain frequencies and thus it makes enough interference to disable all transmission gadgets. But with the time the demand for those jammers among civilians increased greatly and manufacturers decided to start selling those blockers to civilians. In modern society those gadgets, also called jammers, are in great request and have lots of usages. The variety of jammers is truly great so you can easily select the right type of jammer to block any band you like. The most commonly used jammers are the blockers that jam GSM, GPS and Wi-Fi bands.
The attitude to such type of gizmos differs highly in various countries. In several countries its even illegal to possess cell phone jammers of any type. Nonetheless blockers are widely used by ordinary citizens. Especially jammers are highly in demand in large cities and megalopolises.
Regardless of the illegality, disruptors are in good request because they can be effective in great number of cases for example:
1. To disable mobile phones in theaters, movies and other public places
2. To disrupt mobile phones in hospitals
3. To secure conference spaces from industrial espionage activity
4. To defend working places from spying gadgets
5. To provide complete informational security
6. To prevent people from spying on you and detecting your location
7. To preclude explosion of certain kinds of bombs
8. To preclude cheating at tests and examinations
9. To preclude fakements of voting process during various elections
10. To secure military forces from homing missiles
11. To help police forces in struggling against the bandits
Nonetheless, few disadvantages of blockers can also be names. Here are some of them, jammers:
1. Can and will be used during carjacking
2. Are used by criminals in different ways
3. Violate the rights of communication companies
4. Prohibit making of emergency phone calls
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