Now many customers consult us about cell phone blockers after learning about us, and usually put forward many functional requirements: a small number of mobile phone numbers should be blocked separately, or some mobile phone numbers should be open for use, not to mention that it is set to block mobile phone signals, which is actually equivalent to the blacklist and whitelist in the mobile phone address book. However, do ordinary mobile phone signal blockers have the function of blacklist and whitelist?
This question is very interesting, but as a professional mobile phone signal blocker manufacturer, I will tell you very seriously that this type of ordinary mobile phone signal blocker cannot achieve the blacklist and whitelist function.
The main reason is that the ordinary mobile phone signal blockers you see on the market have a very simple principle. Most of them use electromagnetic interference (random noise) to amplify the signal, and then promote and gradually increase the output power, and finally send it out through the wireless antenna. When a mobile phone user enters the coverage area of the shielding signal, for different mobile phone numbers, the shielding signal is not targeted, and there is no analysis or analysis function. Therefore, the shielding effect for different mobile phone numbers is to shield the signal indiscriminately, and this indiscriminateness is not only the difference in mobile phone numbers, but also the difference in the operator to which the mobile phone belongs, and whether the mobile phone is operating on 2G, 3G, 4G, 5G and other network frequency bands.
A customer asked: Is there a mobile phone signal blocker that can identify the credit blacklist and whitelist function? In fact, there is. However, this is not a conventional mobile phone signal blocker, or you can't call it this name. This kind of equipment can be roughly classified as a pseudo base station. And as an ordinary consumer, a machine with this function is not something you can buy and use at will. This must be selected by some special departments or enterprises authorized by the country through regular platforms to regular manufacturers.