Today almost everyone owns a cell phone. Mobile phones have greatly penetrated the global economies to the extent that some individuals own two cell-phones. Corporate employees and students alike all own cell phones. The difference arises from the make or functionality of the phone. cell phone jammer , as the name suggests, is used to shield the cell phone signal and no telecommunication function available.

The cell phone jammers originate from a range of hazard accompanying with the coming of cell phone. In some important meeting, natural or unconscious dialing or forgetting turning off the cell phone may lead the leakage of confidential information. And though the cell phone has powered off, if the battery has not been taken out, it can still be activated to be wiretapping tool with the help of high technology. And the scene and talk on-site can be intercepted and captured by opponent easily.

Now in the case that no obvious effects to post a notice ,some hospitals, gas stations and theaters install the cell phone jammer to solve the problem of the interference to medical electronic equipments, the hidden danger of the equipments in gas station and so on. However, the restriction of cell phone arises the disagreements from cell phone users. They believe the cell phone jammer infringe the civil telecommunication rights.