how mobile phone detector works the influence
Usually when we are in a big theater, our mobile phone signal is very poor. I suspect that someone used a how mobile phone detector works to shield our signal.
Let’s first understand the shielding method of mobile phone jammers: The mobile phone jammer uses the latest Israeli interference technology to generate a fixed electromagnetic signal, covering mobile communication GSM, CDMA, GPRS, local call, and PHS frequency bands, so that the mobile phone is in some Certain places cannot be used, so as to solve some of the negative effects of mobile phone signals in daily life. The common mobile cell phone jammer on the market operate at 869~894MHz; 925~960MHz; 1805~1880MHz and 1900~1990MHz. The operating frequency bands are CDMA800, GSM900, DCS1800, and PCS1900. It can control the range of about 40 meters in diameter, using DC-DC converter input voltage and 5V output voltage. After 3G signals are on the market, the working frequency band of mobile phone jammers on the market has also been upgraded from the previous four frequency bands to five frequency bands. On the basis of the previous four frequency bands, the frequency band of 2100 to 2200 has been added. It is used for shielding and Interference 3G frequency band. For the uplink and downlink channels of the mobile phone system, it uses techniques such as frequency multiplication, frequency division, and frequency hopping filtering to analyze the required shielding frequency; customize a spherical shielding space according to the power of the how mobile phone detector works, within the specified range The shielding magnetic field is automatically formed, so that mobile phones (including PHS-China Telecom PHS GSM-China Unicom, China Mobile, CDMA-China Unicom) mobile phones in this space become invalid. When the mobile phone jammer is in working condition, it can disable the signal receiving and sending function of the mobile phone within the specified range, and cannot dial out and dial in, so as to achieve the purpose of mandatory prohibition.
Not much nonsense, let me introduce some methods to crack the shielding instrument:
Now I teach you a simple cracking method, most mobile phones can be used, the length of time to crack depends on the quality of your phone. In fact, the method is very simple. Enter your phone settings, click "Network Settings", change the network mode to "Manual Mode", and then enter "Network Search", wait until the words "China Mobile" or "China Unicom" appear, then Exit now. The phone will have a signal, but the length of anti-blocking time depends on the quality of the phone.
This method is applicable to most mobile phones.
Principle: The mobile phone works in a certain frequency range. The mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. Then the mobile phone jammer scans from the low end frequency of the forward channel to the high end at a certain speed during the working process. 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.
2. Use 3G network
3. Use Bluetooth: Make the answer into a file with a mobile phone. Use Bluetooth to transfer files.
(Choose the specific operation method yourself)
4. Use wireless local area network (commonly known as wifi or wlan)
5. Use another frequency to destroy the frequency of how mobile phone detector works The method can refer to Hollywood blockbusters: use aelectron gun to shoot into the sky, (that is, the kind of gun head that constantly emits electric sparks), and then the atmosphere surges and lightning starts (by the way, if a lightning strikes during the exam, there will The signal may be unshielded), all electronic devices within one kilometer around are not working properly...Then, the shielding is lifted. (This is for reference only, not recommended)
6. Change the telecommunications number, this is very good, most of the mobile phone jammer frequency band cannot be covered. (Mobile phone jammers are interference technologies that use microwave radiation to generate constant electromagnetic signals within a certain distance range, which can cover various frequency bands of mobile communication, such as GSM and CDMA frequency bands, so that mobile phones cannot be used in certain places where mobile phone jammers are installed. .So as long as you select the right frequency band, the telecom card can also be shielded)
7. Turn off and then on again. (Need trial and error, more troublesome)
8. Twist the antenna of the signal band corresponding to your mobile phone on the mobile phone jammer. If it is loosened, it will not be shielded. Generally, mobile phone jammers have five antennas.