No matter what cell phone card you use, as long as the cell phone cards under China Mobile, China Unicom and China Telecom will be blocked. WIFI will also be blocked. Unless you use 5.8G WIFI to surf the Internet, because the signal jammer does not shield the 5.8G WIFI as standard. However, some schools may allow mobile phone jammer manufacturers to order 5.8G frequencies just in case, so this is not guaranteed to be absolutely foolproof. Whether it is a large Cell Phone Wifi Jammer For Sale is a small mobile phone signal jammer, its principle is to interfere with the mobile phone to receive the normal frequency sent by the base station through its own frequency, so that the mobile phone cannot contact the base station, so as to achieve the purpose of shielding. The principle of shielding WIFI is actually that the mobile phone jammer will send out the corresponding frequency when working to interfere with the mobile phone to receive the normal frequency sent by the router, so that the mobile phone cannot connect with the router and cannot access the Internet normally. cell phone jammer
In the annual college entrance examination and entrance examination, major operators will issue a warm reminder: In order to ensure the smooth flow of signals around the campus, the operators have arranged in advance for communication engineers to test the entrances and exits of each test center and the rest area for parents to accompany the test, and conduct tests on nearby base stations. Software and hardware expansion to ensure the communication needs of parents who accompany the test area during the test. Except for the signal being blocked during the exam, we have done our best to ensure that your communication is unblocked. Every year in the college entrance examination, in order to prevent fraud in the examination, all communication signals in the examination room will be blocked. There is Cell Phone Wifi Jammer For Sale in the examination room, Common signal jammers: At the same time, there is a radio monitor outside the test room that can help fix the electromagnetic wave signals of those frequency bands that the mobile phone jammers can’t take care of, and monitor radio wave signals from unknown sources in real time.