Signal blocker why is it jamming your cell phone?
If we think of a cell phone as a hand-held two-way radio, radios can be interfered with, and cell phones are no exception. Like any radio, cell phone signals can be jammed.
IJamming mobile phones is like jamming any other type of radio communication. A mobile phone communicates with its service network through a base station. As the phone user drives down the street, the signal switches from one base station to another.
Jamming devices basically emit the same radio frequency signals as cell phones. Because of the same frequency, the phone can't tell which signal is the regular base station signal, thus achieving "interference". As long as there is a machine with the same frequency as the phone, it makes a lot of "noise" when the base station tries to connect to the phone. You will find that the signal from the phone is unrecognized, so you will refuse to communicate with the phone.
In the early days, cell phone jammer blocked only one set of frequencies, such as 2G, while complex jammers could block several types of networks at once, such as two-three-four G. So how does this multi-network interference come about? It's simple. In other words, the jamming bands corresponding to the three signals are repeated in a circular manner, covering the three jamming bands at the same time, at such a small interval that the phone has no chance to speak, only to sit down.
What about bluetooth and wifi? It doesn't matter. It can be fixed. Once again, jammers have evolved to add bluetooth and wifi bands to the scanning range, leaving several forms of communication common in society completely covered. Most people don't understand the difference between bluetooth, wi-fi and mobile data. It seems to be wireless communication technology, but the main difference between them is frequency band. In the mobile communication technology, 2G mainly works in the band of 900-1700mhz, 3G works in the band of 1900-2100mhz, and 4G works in the band of 2300-2500mhz. Bluetooth and WiFi work in 2.4GHz.