Do conventional cell phone signal jammers have blacklist and whitelist functions?
Some customers are asking us about mobile phone signal blockers, and they often ask for such functional requirements: it is necessary to block individual mobile phone numbers separately, or to open and not block individual mobile phone numbers. This is actually This is what we call the blacklist or whitelist of the phone. So, does the conventional cell phone signal jammer have blacklist and whitelist functions?
The answer is clear. As a professional manufacturer of cell phone signal jammers, we will tell you very clearly and with certainty that conventional signal shielding devices do not have the functions of blacklisting units and whitelisting.
This is because the working principle of our most common mobile phone signal jammers is relatively simple. Most of the interference signals (white noise) are amplified by the signal, then driven by power and gradually amplified, and finally transmitted through the antenna. When a mobile phone user enters the coverage area of the shielded signal, for different mobile phone numbers, the shielded signal is not targeted, and there is no analysis or analysis function, so the shielding effect of different mobile phone numbers is to carry out the signal indiscriminately. Shielding, and this indifference is not only the difference in mobile phone numbers, it will not distinguish the operator the mobile phone belongs to, nor which network standard the mobile phone is running on, such as 2G, 3G, 4G, and 5G.
Some customers will ask: Is there any mobile phone signal blocker that can realize blacklist and whitelist functions? Actually there is. But this is not a conventional mobile phone signal jammer, or it cannot be changed to such a name. Such devices can generally be classified into the category of pseudo base stations. Moreover, as a general user, a device with these functions cannot be purchased and used without permission. This must be adopted by some special departments or units licensed by our country to formal manufacturers through formal channels.