Although cell phone jammer is quite illegal in many countries,but it still remain popular.That is because it is ideal and useful in a lot of cases.
Commenting on the advantages of using the cell phone jammers, the first mentioned is the ability to block, such as cinemas, movies, restaurants, etc. Some people can not or just do not understand that mobile phones in public places to stimulate them on the phone talking to people around. This is really terrible play or movie, you hear loud tones, very annoying after you hear someone whisper: "Hello, how are you? I can not say Let me call you back later." This distracted easily damage any play or film, even the most interesting one. Or just imagine the challenge it is to listen to other people on public transport in the phone blabbing. The only way to stop annoying other people around them to prevent interference with their use of mobile phones connected via GSM. For GSM connections, which can in some hospitals and medical device type phone can be devastating invasion, the patient's leisure. Therefore, many hospitals provide specialized jammers to prevent adverse effects mobile phone.
Another problem, jammers help combat a spy bugs. Spy listening devices of modern office place, to obtain confidential information ideal. Listen to the conference hall in the place of your error will be very easy as ABC to make industrial espionage. And, as you know, industrial espionage can greatly harm your business, and even destroy your company. The leak is very dangerous, we should use all means to stop you. Most of the incorrect use of spies, so the interference of the powerful GSM 3G will provide the necessary information security using GSM's 3G connection. There are even special high-power jammers suddenly blocked the main radio frequency. So if you need absolute information security and 100% guarantee that all transmitters will be blocked spyware, you should use the full band jamming purposes.
In our society everyone has the right to privacy, but there are many cases, when someone tries to invade our privacy for some reason. These reasons may be different, but the result is only one, some people know some of us we do not want others to know. You can spy on those who want to be criminals steal your stuff, your wife or husband may want to track you, because you are cheating your loved one, your competitors may track your position to get what they want information, and even some of secret services, you can track my every action. I am not a love so much attention and you do not, I think. Global positioning system jammers, and again only to protect the global positioning system to track spies and error to us. A small jamming device that can easily into your pocket will ensure that you effective protection against tracking device, which will protect your privacy.
Another big problem, can help solve the jammer is cheating. I said these cases of academic fraud in a variety of 
communication devices in addition to the information from the examination room. For example, many students in the exam to receive text messages using their cell phone the right answer, to call their friends get the answers. Even if the technology is now available to the students the ability to browse the Internet with their mobile phones, in order to find the information they need on the Internet. In addition, many students from the different Bluetooth devices will help the help of friends. This is why many school teachers and university professors examination rooms, equipped with jammers to prevent a GSM, 3G or Wi - Fi and Bluetooth bands. In many countries, the use of jammers to be prohibited, but some countries allow a variety of other methods to prevent cheating.
School examinations is not the only place where high-tech gadget is used to influence the results. Spy devices thus several cases are found in different elections. And again jamming equipment is used to prevent interference with the voting process.
However, jammers are used for civilian purposes, not only. Military and police forces also have a large number of anti-jamming technology and equipment. The most serious of which is the bomb. Not everyone can disable the bomb, but a mobile phone signal jammer is activated, can help bomb. These bombs are more popular in the terrorists, because they can be easily detonated with a simple phone call. This is why cell phone jammers to prevent detonation of the detonator because the phone will not receive calls, and thus will not be activated.
The military also is finding that the interference device is in the target under the guidance of GSM or GPS signal is ideal defensive missiles. This type of homing missiles are very effective, and therefore very popular. Therefore, its use during the course of a number of important figures in the assassination attempt, the risk is very high. This is why almost all of the shielding device for use during military operations, making them totally responsible for the enemy whereabouts are unknown. This is the secret of successful operations, the statement of the key.
As for the police force, they use the jammers, more often, especially in dealing with criminals. It is very important, cut off the bandits hideout in search of communication between offenders, so that they can not coordinate their actions or issue a warning about the police invasion of the other bandits. The most simple way, the police cut off the communication is blocked all the main frequency of strong interference.
