As the increasing popularity of this kind of communication products facilitates our life, we should notice that the noise pollution caused by the cell phone is becoming more and more serious along with the unlimited use of the cell phone. For example, in such public locations as the meeting room, court, theater, library, hospital, academic hall, and classroom and so on, the free use of the cell phone ruins the previously quiet and serious atmosphere so that normal implementation of some activities will be influenced. In some special locations in the special industries, such as some petrochemical units, the disaster cause by misusing the cell phone has been reported in the recent news and newspapers for not once. Therefore, the cell phone signal shielding and cell phone jammer are necessary.
Moreover, it is realized by every country in the world that the cell phone may lead to leakage of important national information. Many countries have formed the related method and law to clearly limit using of such wireless communication equipments as the cell phone and so on of some specifically important units and persons to maintain interests of the country. Our government has lay enough importance on this kind of problem and the related policy is enacted and implemented by the national leaders in the form of the law. Especially for such important locations where the information is required to be top confidential as government administration office, military operation command authority, bank/securities financial center and examination and so on, some people might intentionally or unintentionally leak such confidential information as political, commercial, military and civil information and so on. The domestic and oversea hostile force performs the long-term satellite positioning and phone monitoring for the cell phone of important units and persons in our country. It becomes the major and serious problem in the political, economic and military life that can not be ignored and does harm to the politics, economics and military affairs and even the safety of our country. As the occurrence is increasing, it should catch everybody?s attention. Therefore, the cell phone signal shielding and Cellular Phone Jammer are necessary.
Besides, it has become a new problem in recent years that many criminals adopt the cell phone or other mobile communication equipment to commit the crime. For example, the criminal remotely controls the detonation of the bomb by such public communication equipments as the cell phone and pager and so on to perform the criminal activity, which has become the more and more common means of more criminals to commit the crime. Since this kind of activities are secret, it is hard to precaution and prevent it and it will bring great danger risk to the related polices who handle the case. Therefore, the cell phone signal shielding and mobile phone jammer are necessary.
The mobile phone jammer is also can be called the jammer, signal jammer, cell phone signal jammer, cell phone signal blocker, cell phone signal isolator, cell phone signal cropper, which can effectively solve the above problems. The electromagnetic signal generated by it can cover such three main frequency ranges as GSM900?DCS1800?CDMA and PHS and so on at the same time. It can shield the signal of 139/138/137/136/135/133/132/131/130 and PHS and so on so that using of the cell phone in some specific ranges can be limited.
As the mobile communication technology rapid develops, the mobile phone (cell phone) is well welcomed by various users for its convenient and quick advantages with no limitation of time and place?and the user has been increasing. Relevant data shows that the amount of using the cell phone in China exceeds that in America and China has become the biggest country of using the cell phone in the world. The use and popularity of the mobile phone in the global range greatly promote the comprehensive development of the politics, economics, military affairs, science and technology, culture and so on of every country in the world. As the symbol of the informatization society, the cell phone has been becoming one of the indispensable tools in people?s daily life and work.
Source: http://www.herbalist.com/blogs/?p=731
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