Now almost every student in a school has their cell phones. What's worse, cell phones are the "weapon" many students use against their teachers. Most students use their cell phones to surf the Internet during a lecture. Many students tend to listen to music or play video games in the classroom. It is common for a cell phone to ring suddenly during a classroom lecture, which is often a distraction. or worse, some students use cell phones to help them cheat on an exam…. A new phenomenon, "cyber bullying", has been reported to indicate that students are electronically torturing others through text messages and social networks when attending lectures.
Under such circumstances, a cell phone signal jammer should be installed for school classes to relieve teachers from this agony. To block the usual 3G 4G WIFI / Bluetooth signals from these cell phones, a 3G 4G WIFI signal interferer for cell phones is sufficient.
