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In some places where the use of mobile phones is restricted, the most common operation method is to install a cell phone signal jammer. However, there are always a small number of people who think about how to crack the cell phone signal jammer so that their mobile phones can be used normally. So are the methods of cracking the cell phone signal jammer searched online reliable?

If you want to crack the cell phone signal jammer, you must first understand the working principle of the mobile phone signal jammer. The working principle of the cell phone signal jammer is to transmit a white noise signal with the same frequency as the mobile phone signal, thereby interfering with the mobile phone receiving the signal of the base station. The mobile phone shows no signal, limited service, etc. The size of the shielding range of the mobile phone signal jammer depends on the transmission power of each module of the cell phone signal jammer and the signal field strength of the base station at the site of use. In theory, the greater the transmission power of the mobile phone signal jammer, the greater the shielding range. The stronger the signal from the base station to the site of use, the smaller the shielding range of the mobile phone signal jammer.

From the principle of the cell phone signal jammer, it is still difficult to crack the cell phone signal jammer. Of course, there are still methods. The cracking methods searched online are completely useless. Here is an introduction to the cracking method of the cell phone signal jammer for reference only.

Without damaging the cell phone signal jammer, if the mobile phone is within the shielding range of the jammer, there are only two ways to restore the mobile phone signal. One is that the mobile phone leaves the shielding range. When the mobile phone leaves the coverage range of the jammer, the mobile phone signal will naturally be restored. The other is that the signal strength of the base station is enhanced without leaving the coverage range of the jammer, so that the shielding range of the cell phone signal jammer can be reduced, and the mobile phone signal can be restored at this time. Of course, this operation is also difficult. Building a base station must be demonstrated, and the strength of the mobile phone signal emitted by the base station is not something you want to enhance.

The Internet says that through the mobile phone settings, change the network settings to manual search and adjust the mobile phone receiving frequency to increase. These two methods are obviously not credible.

Before the cell phone signal jammer in the conference room is officially activated, the shielding effect of the cell phone signal jammer in the conference room must be tested first, so that the installation location and number of cell phone signal jammers in the conference room can be selected.

First, preset the installation location of the cell phone signal jammer in the conference room, and place the cell phone signal jammer in the conference room on the desktop. Generally, it is placed in the front and back corners of the conference room. After the power is turned on and the switch is turned on, the shielding effect can be tested.

During the test, hold the mobile phones of three operators and place them in the opposite corner of the conference room, which is also the farthest position from the cell phone signal jammer in the conference room. Then let the mobile phone stand for about 2 minutes. Do not operate the mobile phone during this period, and then check whether the mobile phone signal on the mobile phone screen is blocked. If it shows no cell phone signal, then the mobile phone of this operator is blocked. If the mobile phone shows a signal, you can try to call the operator's customer service hotline, or use the mobile network for data Internet access. If you can make a call or access the Internet, then move the mobile phone to a position close to the cell phone signal jammer in the conference room, and go back and forth until the mobile phone is completely blocked, and the mobile phone cannot make calls or access the Internet. This is used to determine the shielding range of the conference room cell phone signal jammer, and the number of conference room cell phone signal jammers to be used is determined by this shielding range.

If the cell phone signal at the conference room is strong, and the low-power conference room cell phone signal jammer cannot completely shield the entire conference room, you can determine the signal frequency band that the conference room mobile phone signal jammer cannot shield, and then use the high-power shielding module to interfere with this frequency band based on the tested frequency band. First, you need to download the Cellular-Z mobile phone APP on an Android phone, and then open this mobile phone APP while turning on the conference room cell phone signal jammer, and then take a screenshot and send it to the manufacturer of the conference room cell phone signal jammer, so that the manufacturer can determine the cell phone signal frequency band that the conference room cell phone signal jammer cannot shield. Finally, by using a high-power shielding module to cover the frequency band with a strong signal, the cell phone signal in the conference room can be shielded.

As we all know, cell phone signal jammers are composed of many interference modules with different frequencies, and the frequencies between these interference modules and antennas must correspond one to one. So why should they correspond one to one? If they do not correspond one to one, what problems will there be?

The interference modules of cell phone signal jammers are divided according to the signal frequencies used by mobile phones, ranging from 800M to 6G. Mainstream cell phone jammers are generally divided into 10-12 interference modules. Interference modules are divided according to the output signal frequency, and the division of antennas is also based on the frequency of the signal.

The frequencies between the interference modules and antennas of cell phone signal jammers must correspond one to one, so that the effective working frequency of the interference modules can be fully utilized. In the output frequency and power covered by the interference modules, through the antennas corresponding to the frequencies, these signals can play a greater interference role.

If the frequencies between the interference modules and antennas of cell phone signal jammers do not correspond, first of all, the signal of this frequency emitted by the interference module will have a very small proportion of its function, and the real function of this interference module cannot be played. It will also cause more stray signals to be generated, thereby affecting the normal operation of other electronic devices. Secondly, it may also cause the transmission power of the interference module of the mobile phone signal jammer to be unable to be normally transmitted from the antenna, resulting in the self-excitation of the interference module, which in turn causes the high temperature of the interference module amplifier of the mobile phone signal jammer to burn out.

In summary, the frequency of the transmission signal of the interference module of the cell phone signal jammer and the frequency of the antenna must correspond one to one, so that the real role of the cell phone signal jammer can be played.

As we all know, cell phone signal jammers are composed of many interference modules with different frequencies, and the frequencies between these interference modules and antennas must correspond one to one. So why should they correspond one to one? If they do not correspond one to one, what problems will there be?

The interference modules of cell phone signal jammers are divided according to the signal frequencies used by mobile phones, ranging from 800M to 6G. Mainstream cell phone jammers are generally divided into 10-12 interference modules. Interference modules are divided according to the output signal frequency, and the division of antennas is also based on the frequency of the signal.

The frequencies between the interference modules and antennas of cell phone signal jammers must correspond one to one, so that the effective working frequency of the interference modules can be fully utilized. In the output frequency and power covered by the interference modules, through the antennas corresponding to the frequencies, these signals can play a greater interference role.

If the frequencies between the interference modules and antennas of cell phone signal jammers do not correspond, first of all, the signal of this frequency emitted by the interference module will have a very small proportion of its function, and the real function of this interference module cannot be played. It will also cause more stray signals to be generated, thereby affecting the normal operation of other electronic devices. Secondly, it may also cause the transmission power of the interference module of the mobile phone signal jammer to be unable to be normally transmitted from the antenna, resulting in the self-excitation of the interference module, which in turn causes the high temperature of the interference module amplifier of the mobile phone signal jammer to burn out.

In summary, the frequency of the transmission signal of the interference module of the cell phone signal jammer and the frequency of the antenna must correspond one to one, so that the real role of the cell phone signal jammer can be played.

First, the cell phone signal strength from the base station to the use site

What is cell phone signal strength? It is the signal strength emitted by the base station. The closer the distance to the base station, the stronger the cell phone signal from the base station to this place. Then, in different places, the signal received by the mobile phone is not always the same. Everyone should have experienced intermittent mobile phone call quality and slow Internet speed. This is caused by the strength of cell phone signals in different places. There are also many factors that affect the strength of mobile phone signals. First, the distance to the base station and whether there are obstructions between the base station and the site. If there are obstructions, the signal will also attenuate and the signal strength will also decrease. Professionals can measure detailed signal types, spectrum distribution, and signal strength parameters through professional equipment spectrum analyzers. Android phone users can also download and experience it through a mobile phone APP (cellular-Z). Sometimes the distance from the two use sites to the base station is similar, but the shielding effect of the cell phone jammer is naturally different. This is because there are obstructions between the base station and the use site of the cell phone jammer, such as buildings, trees, mountains, etc. In short, the stronger the cell phone signal strength at the use site, the smaller the effective shielding range of the cell phone jammer.

Second, the structure and area of ​​the use site

Whether there is a partition indoors at the use site, what material the partition is made of, and the size of the use site are also factors that affect the shielding effect of the mobile phone jammer. The mobile phone jammer emits a white noise signal with the same frequency as the mobile phone signal. After passing through the wall, the signal strength emitted by the mobile phone jammer will be severely attenuated, which may not be enough to shield the mobile phone signal in the compartment. If the area is too large, the mobile phone jammer cannot completely shield the mobile phone signal of the entire use site. Because the signal emitted by the cell phone jammer will gradually weaken with the increase of distance, it is necessary to consider adjusting the position of the mobile phone jammer or increasing the number to supplement the unshielded area. For reference, SMa-818B5, this cell phone jammer has a beautiful shape and no noise when working, which is especially suitable for use in conference rooms.

Third, the RF power of the interference module of the cell phone jammer

Cell phone jammers can be divided into many interference modules according to different frequency bands. The power emitted by the interference module is also a decisive factor in determining the shielding range of the mobile phone jammer. Theoretically, the greater the transmission power of the jammer's jammer module, the greater the shielding range of the cell phone jammer. At the same time, the penetration of the wall will also increase, and the shielding effect of the cell phone jammer will naturally be better. Of course, we cannot only pursue the interference effect and make the transmission power of the jammer's jammer module higher and higher. At the same time, we must also consider the radiation hazards of the mobile phone jammer. The greater the power, the greater the harm of electromagnetic radiation to the human body. It is recommended to choose cell phone jammers with different transmission powers according to different environments.

The use of cell phone signal jammers in examination rooms is now basically standard, and it is common and not surprising. When you enter the examination room, you will also find a common device, that is, a radio-controlled clock. Radio-controlled clocks, as the name suggests, are clocks that display time, but radio-controlled clocks are not simple clocks. Radio-controlled clocks are clocks that ensure the accuracy of time by receiving wireless signals from the National Time Service Center. They are much more advanced than ordinary clocks.

The signal blocked by the cell phone signal jammer is the wireless signal, so will the mobile phone signal jammer interfere with the radio-controlled clock? To understand whether the cell phone signal jammer interferes with the radio-controlled clock, the first thing to understand is the frequency used by the radio-controlled clock when receiving the wireless signal from the National Time Service Center. Radio-controlled clocks receive signals from the National Time Service Center in two general ways: one is to receive the timing signal through GPS, and the other is to obtain the timing signal through 4G signals. The signal emitted by the mobile phone signal jammer does not contain the GPS signal frequency, so it will not interfere with the GPS timing signal received by the radio clock. When another type of radio clock obtains the timing signal through the 4G signal, the cell phone signal jammer will interfere with the radio clock when it obtains the timing signal, but there is no need to worry about the large error in the time displayed by the radio clock.

When the radio clock receives the timing signal, it is mainly used for the time calibration of the radio clock. The cell phone signal jammer does not affect the normal use of the radio clock, and the radio clock still displays the current time according to the normal time even when it does not receive the timing signal. Even if the radio clock is interfered by the shielding signal of the cell phone signal jammer, it will not cause a large error in the time display of the radio clock. Because even if the radio clock cannot be calibrated through the timing signal for more than half a year, the error between the time displayed by the radio clock and the standard time is extremely low and can basically be ignored.

Before installing the conference room signal jammer, it is necessary to test the shielding effect.

First of all, when it comes to conference rooms, they are generally divided into three types: small conference rooms, medium-sized conference rooms, and large conference rooms. Before installing the conference room signal jammer, the test methods for these three types of conference room signal jammers are also different, and the environments of these three types of conference rooms are completely different.

The area of ​​the small conference room is relatively small, the environment is relatively simple, and the requirements are not very high. During the test, you only need to place the conference room signal jammer on the table against the wall, and then test whether the mobile phone is blocked at the farthest distance from the conference room signal jammer.

Medium-sized conference rooms are generally located on higher floors. The higher the floor, the stronger the signal from the base station to the conference room. In addition, there are basically indoor signal amplification systems in buildings. It is necessary to test the signal strength of various frequency bands separately, and then adjust the conference room signal jammer, or increase the power of some frequency bands to meet the cell phone signal shielding requirements of medium-sized conference rooms. High-power modules can be used to cover the frequency bands with stronger signals separately, and then use low-power conference room signal jammers to shield the relatively weak cell phone signals.

Large conference rooms can also be called venues, which refer to places that can accommodate hundreds or even thousands of people for meetings, such as the Great Hall of the People. The conference room signal jammers used in such large venues are not ordinary low-power signal jammers. A high-power conference room signal jammer is required to meet the purpose of covering the entire venue's cell phone signals, and according to the signal strength of all cell phone signal jammer frequency bands within the tested venue, the signal strength of the transmitting signal source must be adjusted to achieve the purpose of reducing the mobile phone signal in the venue, so that the conference room signal jammer can play the greatest role.

Low-power cell phone signal jammers are basically used indoors, and high-power cell phone signal jammers are basically used outdoors.

When using a low-power cell phone signal jammer outdoors, the most important thing is to pay attention to rain protection. Just install a canopy above the mobile phone signal jammer, and pay attention to waterproofing the power supply line before it can be used normally.

The chassis of the high-power cell phone signal jammer has been waterproofed. There is no need to worry about normal rainfall. You only need to pay attention to the installation height of the cell phone signal jammer host. When using a high-power cell phone signal jammer outdoors, not only should you pay attention to rain protection, but you also need to do lightning protection.

The lightning protection method is to weld the antenna bracket to the lightning rod, and then insert a steel chisel about 2 meters long into the ground, and weld one end of the steel chisel to the antenna bracket or the lightning rod with steel wire. Of course, the connector of the power supply line of the high-power cell phone signal jammer should also be waterproofed.

In order to better enforce the ban on the use of cell phones in prisons, relevant departments will require communication companies to ban uncertified communication equipment. This measure may be based on one of the serious violations of relevant laws and regulations. Standards enforce the law. Legislators in the lower house of parliament can read the decree on Monday.

Prison Section Chief Andre said: "Although the previous series of secu rity measures did not have actual results and instead led to an increase in the illegal use of communication equipment, the promulgation of this latest policy will definitely increase the number of solutions. This probability of confusion. Once the jammer is recognized on the mobile device, we can further comfort the victim and prevent illegal activities to a greater extent than before. "British Enforcement Prison Cell Phone Signal Jammer, The use of mobile phones in prisons is prohibited.

This method will mean that once an unauthenticated mobile phone or SIM card is checked by a new generation of inspection equipment, the authority part of the prison can make a request to the court through normal procedures and ask the communication company to cut off the phone. The detected cell phone may have a SIM card. Senior judicial officials stated that when the People's Court issues an order, it does not necessarily confirm the mobile phone. The user of the SIM card may be a special prisoner. The ban on the use of mobile devices in prisons has been incorporated into the law, and relevant departments have adopted many different methods to enforce this rule, including inspections, full-body scans, and the use of ultraviolet light equipment. Use metal detectors for these. Senior officials from the judicial department said that in 2013, a total of 7,451 mobile phones and SIM cards were inspected in prisons. The Chief of Prisons stated that the illegal use of mobile phones in prisons will likely lead to violence and disorder, and may even allow organized and illegal criminal gangs to continue their illegal activities, such as drug smuggling. A series of illegal activities. cell phone signal jammer

The standard for stopping the use of mobile phones in prisons also includes blocking cell phone signals, but through long-term practice, this method has inevitable difficulties. Because the prison signal is blocked.

Other ancient buildings surrounding the prison are often injured together.

In order to better enforce the ban on the use of cell phones in prisons, relevant departments will require communication companies to ban uncertified communication equipment. This measure may be based on one of the serious violations of relevant laws and regulations. Standards enforce the law. Legislators in the lower house of parliament can read the decree on Monday.

Prison Section Chief Andre said: "Although the previous series of secu rity measures did not have actual results and instead led to an increase in the illegal use of communication equipment, the promulgation of this latest policy will definitely increase the number of solutions. This probability of confusion. Once the jammer is recognized on the mobile device, we can further comfort the victim and prevent illegal activities to a greater extent than before. "British Enforcement Prison Cell Phone Signal Jammer, The use of mobile phones in prisons is prohibited.

This method will mean that once an unauthenticated mobile phone or SIM card is checked by a new generation of inspection equipment, the authority part of the prison can make a request to the court through normal procedures and ask the communication company to cut off the phone. The detected cell phone may have a SIM card. Senior judicial officials stated that when the People's Court issues an order, it does not necessarily confirm the mobile phone. The user of the SIM card may be a special prisoner. The ban on the use of mobile devices in prisons has been incorporated into the law, and relevant departments have adopted many different methods to enforce this rule, including inspections, full-body scans, and the use of ultraviolet light equipment. Use metal detectors for these. Senior officials from the judicial department said that in 2013, a total of 7,451 mobile phones and SIM cards were inspected in prisons. The Chief of Prisons stated that the illegal use of mobile phones in prisons will likely lead to violence and disorder, and may even allow organized and illegal criminal gangs to continue their illegal activities, such as drug smuggling. A series of illegal activities. cell phone signal jammer

The standard for stopping the use of mobile phones in prisons also includes blocking cell phone signals, but through long-term practice, this method has inevitable difficulties. Because the prison signal is blocked.

Other ancient buildings surrounding the prison are often injured together.