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May 29, 2022

How to avoid interference from cell phone jammers?

People began to use cell phone signal jammers, and how to reduce the risks brought by jammers has also become a research direction. Let me explain how to crack the interference of cell phone jammers.

According to the type of mobile phone jammer device, choose to crack.

Due to the rapid development of the wireless network, it has now developed into a 4G network, and many test rooms use older model signal blockers, which can only block 2G networks such as PHS, China Mobile, China Unicom, etc., but not for 3G networks. Even the current 4G network is helpless, the cracking method: use a 3G or 4G card.

Band cracking method.

Band cracking method. Because the working principle of the school’s cell phone jammer is to block the mobile phone by interfering with the mobile phone signal in the specified band, as long as the receiving and transmitting frequency of the mobile phone is modified, it can be prevented from being blocked. The blocker only blocks the mobile phone signal of 900-1800MHZ, while the mobile phone’s receiving and transmitting The frequency is 850-1900MHZ, which is larger than the shielding range of the jammer, so as long as the receiving and transmitting frequency of the mobile phone is adjusted to the maximum in the mobile phone settings, the mobile phone signal can be received normally.

WIFI cracking method.

This method has relatively high environmental requirements, and the premise is that there must be an available wireless network around. Some cell phone jammers cannot block WIFI signals but can communicate with the outside world.

Bluetooth cracking method.

It is suitable for short-distance communication in the shielded area. Some shields may ignore the transmission function of Bluetooth without shielding, so we only need to install the Bluetooth messaging software on the mobile phone to communicate normally in a small range.

In general, it is not easy to crack the shielded environment, and staying away is the best choice.

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