Nowadays, many parents are afraid that children will use their mobile phones to play instead of learning. This wifi signal jamming devices is often used in schools, conference rooms, prisons and other places where mobile phones cannot be used. It comes standard with all 2G 3G 4G mobile phone signals and 2.4G WIFI signals. As long as it is within its shielding range, all mobile phones cannot make calls, send text messages and access the Internet, and will not affect other electronic devices.
If you put the jammer device in a closed steel (iron) box, the phone with the relatively good quality can still talk, and the normal mobile phone will not work. This is because some electrical equipment, metal objects, buildings, etc. also affect the signals, they reflect electromagnetic waves, and are also related to the weather.
When the home signal is not good, first check if it is in the blind spot of the signal, you can go out of the location, and dial the phone in a wide place. Check whether there are interference facilities. This kind of situation is common in the examing room. If the signal shielding equipment is not turned off after the test, it will cause interference around. At this time, you only need to find the wifi jammer and remove them.
A signal is a tool for carrying a message and a carrier of a message. Various radio waves traveling in space and currents in a well-connected telephone network can be used to express various messages to distant parties. This is an electrical signal, and the mobile phone can receive calls by receiving electrical signals. The cell phone jammer uses the solid co-channel interference to intercept the sad band transmitted by the base station to achieve the purpose of shielding the mobile phone signal. When the uplink interference occurs, the mobile phone signal needs to be stronger than the interference signal to communicate with the base station. Therefore, the mobile phone must Closer to the base station.