Schools may use signal blockers (also called signal jammers) during exams to prevent students from using illegal devices, such as cell phones or other communication tools, during exams. These jammers limit or block wireless signals to prevent students from sending and receiving messages or gaining Internet connectivity during exams.
The specific jammer models and technologies used may vary by school and region. Some common jammer types include:
Wireless signal jammer: Can block wireless network signals, such as Wi-Fi and Bluetooth signals.
Mobile phone signal jammer: It can block mobile phone signals and prevent mobile phone communication functions.
GPS Signal Jammer: Can interfere with or block Global Positioning System (GPS) signals, preventing students from using location-based technology.