Cell phone signal blocker can block 4G signal
Many users are curious about the signal shielding range when using a cell phone signal jammer, which is more obvious in the shielding of 4G signals. In order to facilitate more users to understand and use it, the shielding range will be introduced next.
1. Commonly used mobile communication network signals In addition to the 4G network signals that have been widespread at present, there are also 3G network signals that were popular in previous years, as well as 2G network signals used by some elderly phones. Although the 5G network signal has become a topic that many people are discussing now, it will take some time before the 5G network is widespread.
Second, the first thing that can be clear is that the signal blocker can block the 4G network signal. When the mobile phone works, it is within a certain frequency range. The mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. According to this communication principle, the mobile phone signal jammer scans from the low-end frequency of the forward channel to the high-end/end at a certain speed during the operation. The scanning speed can cause garbled interference in the received message signal of the mobile phone, and the mobile phone cannot detect the normal data released from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone is manifested as finding the network, no signal, no service system and so on.
3. The key to shielding 4G network signals depends on the frequency supported by the selected signal jammer. The current 4G frequency band has a wide range, ranging from 800M-2. 4G, if you want to shield 4G signals, it depends on the jammer you use. How much bandwidth can it support? Because part of the 4G frequency band almost coincides with the 2.4 of WIFI. Once you block the 4G signal, it may make the WIFI and Bluetooth in the blocked area unable to work normally. Therefore, whether the 4G signal can be shielded mainly depends on the function of the shield product and whether the device has a 4G signal shielding module.
The above is the specific operation of the mobile phone signal blocker to block the 4G signal. According to the above introduction, it can be better for users to understand and use the device, and to promote the market sales of the product.