The emergence of mobile phones has both advantages and disadvantages. The development of technology has brought convenience to people, but also brought some unnecessary trouble. For example, students want to cheat on their mobile phones during exams; The custodians in the detention center use mobile phones to communicate with the outside world; Use mobile phones to steal important documents in company meetings. Therefore, in some confidential places, cell phone signal jammers will be selected to isolate cell phone signals in important protection areas, so as to prevent criminals from committing crimes through cell phones to a certain extent.

We are not new to the examination. Many people have participated in it. From the mid-term and final examinations of primary school to the English exam of the university, the AB level exam, and the professional skills certificate exam. If we continue to study, there will be civil servants, graduate students, and so on. There are always some devious people. To ensure the fairness of the examination, each classroom is equipped with a mobile phone signal jammer. It is also necessary to prevent students from cheating through mobile phones. The use of cell phone signal jammers in the detention center can prevent the jailers from colluding with the outside illegal people and doing harm to the society. When the mobile phone rings suddenly during the meeting, it may disrupt the order of the meeting place. Therefore, it is necessary to use the mobile phone signal jammer to interfere with the mobile phone signal, so that the participants can concentrate on the meeting. Besides, it can prevent the disclosure of important content in some important meeting rooms and confidentiality units.