The use and popularity of mobile phones have doubled in the past decade, as evidenced by the fact that the number of mobile phones on Earth exceeds the entire population. Although this is both interesting and worrying, it also means that you may have to handle many unnecessary calls.
Employers use them to block employees' Mobile phone signal to prevent distraction in the workplace. Similarly, some people use them to block signals sent by mobile phones, prevent spy agencies from monitoring them, and prevent sensitive information from falling into the hands of bad people. Then introduce them into civilian communities to address privacy issues and prevent GPS tracking. Nowadays, signal jammers are widely used for various purposes.
Mobile phone jammer is a device that allows you to block all incoming calls anywhere. It achieves this by generating white noise radio signals and broadcasting them at the same frequency and power as those generated by mobile phones. This essentially interferes with the wireless communication system and blocks the signals that your device can receive, thereby disabling cellular and wireless services, including calls, text messages, Wi Fi, and Bluetooth.
Although the basic knowledge behind the operation of a signal jammer may seem very simple, it still involves some technical details that may be difficult for outsiders to understand. For this reason, we will first understand how mobile phones establish communication with each other.
You must have seen huge mobile phone towers in different areas around you. Essentially, every place is divided into areas, and the telephone signals generated by your device will be received by the signal tower in your area. This means that if you are moving, your phone signal will be dynamically received by the corresponding signal tower when you pass through different areas.
So how can interference devices avoid these complex phone towers? They do this by imitating legitimate phone signals and transmitting the same radio frequency as your phone. Therefore, it overwhelms the legitimate signals generated by your mobile device and blocks the wireless communication between your device and the Mobile phone signal tower in your area.
Mobile phones are based on full duplex communication, which means they can send and receive signals simultaneously. For this purpose, they use two independent frequencies or simultaneously listen and speak, and the signal jammer is designed to target these frequencies. Some telephone jammers only target one of these frequencies directly, deceiving devices into believing that there is no available service. Therefore, communication cannot be done through your phone in any direction.
On the other hand, some complex signal jammers may simultaneously block multiple frequencies or be adjusted to avoid specific frequencies. For dual-mode and the third mock examination mobile phones that switch between different networks to best connect open signals, appropriate jammers can also block signals from multiple networks. This means that various cellular devices are susceptible to signal interference.
Interference with cellular signals only requires broadcasting the correct frequency (or multiple frequencies). Although all devices process the signal in different ways, all cellular devices use interruptible radio signals and protocols, including GSM and CDMA. Based on experience, cellular communication uses the 900MHz to 1800MHz frequency band in Asia and Europe, and the 1900MHz frequency band in the United States.
Signal jammers can also be classified based on their range, depending on various factors such as surrounding environment and building density. The coverage range of low-power jammers is usually small and can prevent wireless activity within a 9-meter range, while high-power jammers are also effective in areas as large as football fields. Similarly,cell phone jammer used by law enforcement agencies for security purposes can even block signals from a mile away.
In addition, signal jammers come in various sizes, from small ones that look more like the phone itself to large ones that can be installed in cars and vehicles.
Now that you know the actual working principle of Mobile phone jammer, you can start to find one by yourself, whether to ensure your safety or just to stay away from the world temporarily.
