Despite its compact and exquisite design, this signal jammer is still an ideal choice. This GPS jammer adjustable 3G 4G has many advantages, what do you think? The radiation frequency of the mobile phone signal jammer is the same as that of the mobile phone, so its function is similar to the jammer. This will cause enough interference to prevent the call from connecting to the phone. Currently, there are two types of cell phone jammers. The first category usually includes small devices that prevent signals from being sent from cell phone towers to each cell phone. The blocking frequency is 800 MHz to 1900 MHz. Most devices using this technology can block signals within 30 feet. The phones in this area do not show any signals.
There should be many references on the Internet. Just search for keywords related to mobile communication interference, such as CDMA interference analysis. Moreover, this method of how to make a mobile cell phone jammer is difficult to solve. Food), but the effect is minimal. In some important exhibitions and bidding meetings in some places, three operators used mobile phone jammers to disassemble each other, but there was no good way to protect them. All they can do is dismantle themselves. Since this is to prepare material for the script, I will add an interesting thing for you. In China, in addition to large industrial facilities (such as large power plants), the area with the strongest signal shielding capability in the living area should be located outside Beijing’s Chaoyangmen, between the Ministry of Foreign Affairs and Fenglian Plaza, and lasts for 24 hours. There is no interruption.
The strength of signal interference and band shielding varies. They said that the situation has improved in recent years. I haven’t been here for a long time. When I was there before, the mobile phone had no signal, or the signal was extremely weak, and the walkie-talkie was completely noisy. Located between the Ministry of Foreign Affairs and Fenglian Square, it lasts for 24 hours. There is no interruption. The strength of signal interference and band shielding is different. They said that the situation has improved in recent years. I haven’t been here for a long time. When I was there before, the mobile phone had no signal, or the signal was extremely weak, and the walkie-talkie was completely noisy. Located between the Ministry of Foreign Affairs and Fenglian Square, it lasts for 24 hours. There is no interruption. The strength of signal interference and band shielding is different. They said that the situation has improved in recent years. I haven’t been here for a long time. When I was there before, the mobile phone had no signal or the signal was very weak, and the intercom was completely noisy.