How to stop WiFi jammers from working?
Hello, the use of cell phone signal jammers is often reported in the news, which affects our life communication, how can I stop it?
How to Avoid Signal Interference
Method 1: Due to the rapid development of wireless network, it has now developed to 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.
Method 2: Band cracking method. Because the working principle of the school's blocker 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 much 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.
Method 3: WIFI cracking method. This method has relatively high requirements on the environment, and the premise is that there must be an available wireless network around. Some cell phone signal blockers cannot block WIFI signals, but can communicate with the outside world.
Method 4: 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.
Finally, with the rapid development of the network, the phone jammer is also being updated, and the cost is very low. It only needs to add the frequency band of the known network to the interference ranks to block all radios.