Some individual customers often ask us whether there is such a mobile phone signal blocker, which can only block the signal for the specified mobile phone number, and cannot affect other mobile phones around the specified mobile phone. It is even hoped that even if the designated mobile phone user is far away from other cities, the signal should be blocked. So, can our mobile phone signal jammer achieve such a function?
The answer is no, the cell phone signal jammer cannot accurately block the signal for the specified cell phone number. The reason is: from the basic working principle and method of the cell phone signal jammer, it only emits shielding signals on multiple cell phone frequency bands. Signal, this shielded signal does not participate in the communication and signaling analysis between the mobile phone and the base station, and does not have the function of identifying each mobile phone number or mobile phone identification code. In the area covered by the shielded signal, no matter what number of mobile phone, Regardless of the brand, model, etc. of the mobile phone, the blocking signal of the mobile phone signal blocker will act on these mobile phones, which will make these mobile phones unable to answer or make calls normally. Internet access and data services as normal.
It also needs to be emphasized that the shielding signal emitted by the mobile phone signal jammer has a limited power and a very limited transmission distance. Whether it is a low-power or high-power mobile phone signal jammer, its shielding signal is limited. The effective transmission distance is usually only a few meters to a few hundred meters. Therefore, if you want to pass a mobile phone signal jammer across the city interval, the shielded signal will be transmitted to other cities and affect the mobile phone of the specified number. Talking about the sky and night is simply impossible!