The current Adjustable 3G 4G All Cell Phone Signal Jammer &Amp is full-band. It can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and China Telecom. Its principle is to interfere with its own frequency. The mobile phone receives the frequency sent by the base station and the wireless router, so as to achieve the purpose of shielding them. Therefore, as long as the mobile phone is in the room where the mobile phone jammer is turned on, the mobile phone cannot make and receive calls, send and receive text messages, and surf the Internet. This cannot be avoided by cracking the number and band, because no matter which number or band you use, it is within its shielding range. cell phone jammer There is also Bluetooth software that is not acceptable, because its frequency will also be blocked by mobile phone jammers. The only way is to install a cell phone signal amplifier near the place where the cell phone signal jammer is used to counter it.
There is no way to prevent it. Adjustable 3G 4G All Cell Phone Signal Jammer &Amp is the so-called signal jammer, which can shield all communication signals and cannot be prevented. Effectively shield CDMA (China Telecom), GSM (China Mobile, China Unicom), SCDMA (Netcom Da Lingtong), DCS (1800MHz), PCS (1900MHz), PHS (Telecom PHS), 3G mobile phone signals, WIFi and 4G mobile phone signals Wait for all communication signals. The principle of mobile phone (radio communication) is as follows: within a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission is completed with a certain baud rate and modulation method. In view of the above-mentioned communication principle, the mobile phone jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. This scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone is manifested as a search network, no signal, no service system and other phenomena.