Mobile phone signal blocker, literally understood, is a device that can block mobile phone signals. But it is not simply to let the phone "shut up", there is an exquisite technical principle behind it. It mainly transmits electromagnetic waves of specific frequency to implement electromagnetic interference to the wireless network on which mobile phone communication depends. When the mask is turned on, it will scan from the low-end frequency of the forward channel to the high-end at a certain speed. This scanning speed will form garble interference when the mobile phone receives the message signal, resulting in the mobile phone failing to detect the normal data sent by the base station, and then unable to establish a connection with the base station. The mobile phone will show the phenomenon of searching the network, no signal, no service system, etc. Make you feel like you are in the signal "island". But don't worry, it only blocks the communication between the phone and the outside world, and has no effect on the signal generated by the phone itself, and will not damage the hardware of the phone.
How does it work?
To understand the principle of the mobile phone signal blocker, we must first understand the communication process between the mobile phone and the base station. The mobile phone emits a certain frequency of electromagnetic waves through the built-in antenna to establish contact with the surrounding base station, the base station receives the signal, and then transmits it through a complex network to realize the communication between the mobile phone and the outside world, whether it is a phone call, a text message or the Internet, all rely on this process.
Cell phone signal blockers take advantage of this, and they can transmit interference signals that are close to or the same frequency as cell phone communication. When the blocker is turned on, it acts like a "signal spoiler", scanning the low-end frequency of the forward channel to the high-end at a specific speed, and this scanning speed will subtly form garble interference when the phone receives the message signal. The mobile phone is confused, can not detect the normal data sent by the base station, naturally can not establish a connection with the base station, can only fall into the search network, no signal, no service system and other difficulties, as if it was cut off from the "umbilical cord" with the outside world, can only worry. However, this interference is only temporarily blocked communication, will not cause any hardware damage to the phone itself, once out of the shielding range, the phone can quickly return to normal.
