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In many occasions in daily life, such as exams, meetings, etc., it is very inappropriate to use mobile phones. At this time, in addition to paying for the mobile phone in advance, you can also use cell phone signal jammers to block cell phone data signals and Wi-Fi signals for special occasions. Without cell phone data signal and online data signal, we will not play with mobile phones, which achieves the desired effect very well.

The creation of cell phones has indeed increased the distance between people and provided great convenience for your daily life. However, with the spread of mobile phones, everyone has reached an inseparable state, which has brought great disadvantages to many occasions. Hence the huge shopping malls of cell phone signal jammers.

So, where arecell phone signal jammers suitable for? The application areas of cell phone signal jammers are still very common. Some confidentiality organizations, state agencies, colleges and universities, etc. can learn more about it.

1. Various large, medium and small examinations

Fairness and justice are the key rules of social development, and there are many exams that need to be faced in life, ranging from primary school to junior high school, junior high school to high school, and national-level exams such as college entrance examinations and civil service recruitment exams. In order to prevent students from cheating, in In various large, medium and small examinations, cell phone signal jammers and other means must be used to block information in the examination room so that it cannot reach the cell phone and cannot communicate. Online needs, then it can also be a good way to guard against students' cheating practices.

2. National defense areas, cells, and detention centers

In some areas that require strict control, such as defense centers, prison cells, detention centers, etc., the level of information confidentiality is very high. Mobile phones should be strictly monitored, and mobile phone signals should be blocked in areas such as defense centers, prison cells, detention centers, etc. This can greatly prevent leaks. In addition to the three major types of mobile phone signal jammers described above, in other areas where phone calls are strictly prohibited, such as gas stations, petrochemical plants, hospitals, etc., the effect of installing a mobile phone signal jammer is also very ideal.

3. State agencies and enterprises

State agencies, enterprises, etc. also have demand for cell phone signal jammers. The frequency of meetings held by party building agencies, government agencies, enterprises, etc. can be said to be very high. In order to allow participants to gather more at the meeting and learn the spirit of the meeting more deeply, it is also necessary to pay attention to the use of mobile phones. When leading cadres hold meetings, they turn on cell phone signal jammers to block mobile phone signals. The leading cadres talk happily and the people below listen attentively.

When using a cell phone signal jammer, you can choose it according to the applicable situation. If the location is relatively large, you can use a cell phone signal jammer with too large an output power.

There are some products that are very similar in appearance but different in quality. In the process of purchasing a GPS jammer, you can really have a reasonable way to judge the quality of the device. On this premise, before making the selection This is the basis for everyone in the purchase process, but some people do not fully understand how to judge the quality during the purchase process? There are many ways to do the same thing. After you can accurately carry out the control, you can obtain the required results naturally.

In many cases, some laymen don't know how to judge a GPS jammer, at this time you can immediately grasp the well-known brands. If the brand you choose is very good, then the quality can be guaranteed, but if the brand we choose is not actually very good, the quality will certainly be questionable, so for these laymen In other words, you can carefully choose products from well-known brands, which may be more helpful.

The eyes of the people are bright. When you are in the process of purchasing a jammer through some methods, you need to truly understand their user reviews and take a proper look at what other people’s reviews are like. , you can learn more about all aspects of information in detail, and understand everyone’s comments. If others’ judgments are particularly good, it means that the quality is sufficiently guaranteed, so if you are making a choice In the process, we need to consider things in this field. Therefore, only by ensuring product quality can we bring better application effects to ourselves.

There are many different types of GPS jammers on the market. If you are not sure how to make a decision during the selection process, we can actually compare different devices. In the process, you can understand the advantages and disadvantages of them. Even in bad situations, you can still make the right choice, which is a good way for everyone. Therefore, when everyone makes a choice, we should do a good job of comparing these products, because Only in this way can you further care about clarity and make corresponding choices. Learning to distinguish quality is also the prerequisite and basis for making choices. I hope everyone can do better.

Nowadays, there are more and more criminal activities at home and abroad, especially telecom fraud is getting more and more serious. Do you remember the fraud video of a certain country last year? Let the Chinese people clearly realize the harm of fraud, but do you know what technology these telecom frauds use to locate your location? How to solve the problem of fraud phone not locating your location?

In recent years, fraud criminals have become more and more rampant, and many criminals use GPS to carry out fraud activities more frequently. The actual frequency of cellular calls can cause intruders to track, and intruders try to determine the actual location of everyone or other groups. In order to deal with the use of communication equipment, mobile phone jammers for vehicles are designed.

There are many jammers on mobile phones that are suitable for monitoring or preventing common faults. Therefore, all your personal behaviors will be monitored by others. At all times, you need to be very careful to prevent being tracked by agents. Using GPS blockers can easily prevent intelligence activities. You must install a gps mobile phone jammer in your car, and your location will be kept secret.

If you suspect someone is using GPS to track your location, protect yourself as soon as possible. Imagine that with the help of a GPS spy device, someone can listen to every word of your conversation and use it against you. Besides, the surveillance system is so small that it is almost impossible to find its location. However, when installing a GPS signal jammer in a vehicle or somewhere else, it can not only save time but also ensure safety. It is important to note that if you use mini jammers to protect personal safety and privacy, it is legal to use them.

Cracking method 1: Enter the cell phone settings, click "Network Settings", change the network mode to "Manual Model" and then enter "Online Search".

Principle: The work of the cell phone starts within a certain frequency range. The cell phone signal blocker can only block the phone signal without affecting other nearby electronic devices; save power, the power is 12W-480W.

It is also called cell phone signal blocker, cell phone signal blocker, phone jammer, signal jammer, cell phone blocker, signal obstruction device, cell phone signal isolator, signal isolator, cell phone signal interceptor, radio signal blocker, etc. according to its function.

In order to solve the information security problem during the examination process, many examination halls usually use cell phone signal blockers and conduct external signal interference within a certain range in some ordinary high schools.

How does the blocker interfere with mobile phone signals?

Simply put, the cell phone signal blocker is to block the phone and base station through radio waves within a certain frequency range, and complete the data and sound transmission with a certain baud rate and modulation method to interfere. In fact, during the work process, the mobile phone contacts the base station through the uplink frequency, and then transfers the signal to the MSC mobile service switching center to realize the call.

Cracking method 2

1. Use Bluetooth: upload the answer to the file with the mobile phone.

The cell phone signal jammer uses microwave radiation interference technology to emit tangible electromagnetic signals within a certain distance range.

2. Method of cell phone signal jammer.

It uses frequency multiplication, frequency division, frequency hopping filtering and other technologies for the uplink and downlink channels of the mobile system to analyze the required screen magnetic field; customize the spherical shielding space according to the power size of the jammer, and automatically form a shielding magnetic field within the specified range, so that the phone in the space loses the mobile phone.

The cell phone signal jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. The scanning speed can form a chaotic code interference in the phone in the received message signal. The mobile phone cannot detect the normal data sent by the base station, so that the cell phone cannot establish a connection with the base station. In order to cope with the continuous development of the communication system, the third-generation cell phone signal jammer has been carefully developed according to the actual situation of foreign mobile communications.

The examination room must strengthen discipline and specialize in the main examination and monitoring of the test process, prohibiting any cheating. In addition, the cell phone signal jammer is also suitable for all prohibited places such as military, government agencies, prisons and gas stations.

When the cell phone signal jammer is in working state, it can make the mobile sending and receiving signal function in the specified range invalid and unable to dial out and dial in, thus achieving the purpose of mandatory disabling.

In many complex environments, the situation on the scene is unclear. In order to make the cell phone signal jammer play a very good effect and prevent accidents in special occasions. For the situation of the power supply system of the equipment going out to perform tasks, the cell phone signal jammer is usually equipped with a built-in battery or an external battery box. Increase the use time of the impact instrument and protect the combat personnel from the harm of the remote control time bomb. Whether the cell phone signal jammer uses a built-in battery or an external battery box, there is still a lot of knowledge in daily maintenance of the internal structure battery when it is idle. Let's discuss how to maintain the built-in battery or external battery box of the cell phone signal jammer.

Regardless of whether the cell phone signal jammer uses a built-in battery or an external battery box, the current mainstream batteries and battery boxes all choose 18650 lithium batteries as the most basic lithium battery core of the battery. The 18650 lithium battery core has the advantages of easy to carry, sufficient power, and long service life. Only by properly maintaining the battery on a daily basis can the built-in battery of the mobile phone signal jammer be fully utilized and the battery life be increased.

Use the cell phone signal jammer to charge with the correct charger. The batteries used in cell phone signal jammers are basically customized batteries, so the battery charger is equipped independently according to the customized batteries. Therefore, the charging of the built-in battery of the jammer also needs to be equipped with a special charger.

If the cell phone signal jammer is not used for a long time, it is necessary to charge and discharge the built-in battery of the jammer once in a while. If the built-in battery of the cell phone signal jammer is not charged in time, the internal 18650 lithium battery cell may be damaged. If it happens, after the battery is fully charged, the cell phone signal jammer will find that the time used is much shorter than the normal time before. After waiting for a while after standby, it will be restarted. The cell phone signal jammer can continue to operate for a period of time. At this time, it can be basically judged that the 18650 lithium battery cell of the cell phone signal jammer has a common fault and needs to be returned to the factory for repair.

In general, after using the cell phone signal jammer, it must be charged in time to ensure that the battery has sufficient power. In the case of long-term non-use, it is also necessary to charge and discharge frequently to increase the battery life

The application of full-screen segment cell phone signal blockers cannot give up the cost of modern communication technology for the people.

Among the people who use full-screen segment cell phone signal blockers, some are to prevent cheating in exams, and some are to keep the venue quiet or exchange privacy protection, which are all derived from the desire and purpose of excellence. However, there are still their own interests. For example, the owner of a telephone booth is likely to use a full-screen segment cell phone signal blocker to affect the mobile communication base station around the business location, making it difficult for people working near the telephone booth to use their mobile phones, but to change to voice chat in the telephone booth to improve their source of life. In addition, mobile communication operators may also use full-screen segment mobile phone signal blockers to harm the interests of the other party, allowing you to gain an advantage in some of the same industry competition.

The above is a lot of people use full-screen segment cell phone signal blockers to say, but no matter what the purpose is, do not give up the cost of modern communication technology for the people. In fact, according to scientific research, it is possible to assemble a full-screen segment cell phone signal blocker without affecting the start of modern communication technology for the people. There are three reasons why the full-screen segment cell phone signal blocker disrupts the mobile communication base station signal:.

First, the user of the full-screen segment cell phone signal blocker did not consider the communication fraud of the smiling face, and the target of action was wrong. It should have restricted the mobile phone communication of a small number of people (such as students), but expanded the overall goal to other general people around.

Second, the operation steps are unscientific. Because the installation method of the full-screen segment cell phone signal blocker is unscientific or its signal strength is set too high, it should be controlled within a reversible range but it is not well controlled.

Third, the purchased full-screen segment cell phone signal blocker does not meet the radio equipment approval standards, the power exceeds the standard, or it is a counterfeit and substandard product. Finding the cause, in order to solve the impact on the mobile subway signal, it is actually very simple: first use reliable manufacturers to meet the standards, secondly select the assembly position and direction of action, and thirdly set the appropriate signal strength to limit the transmission signal to a closed reversible range. If the above three points can be achieved, the impact on nearby mobile communication base stations can be minimized.

2. The unscientific application of full-band cell phone signal blockers in schools may cause unnecessary harm to the human body.

Basic knowledge analysis shows that when the full-band cell phone signal blocker is working, if the setting is not standardized and the signal strength is too high, in a reversible large conference room, classroom and other enclosed spaces, electromagnetic waves accumulate in a small space, and according to the original external distance wall, ceiling, and ground multiple reflections, the staff in the room will be in a relatively serious electromagnetic wave radiation. According to the survey, the college entrance examination and the high school entrance examination are the venues where the full-band cell phone signal blocker is used the most. Therefore, some test sites using the full-band signal blocker have caused some victims (college entrance examination inspectors, teachers and students) to become restless, unable to concentrate time and energy, and some students even have headaches. All signs indicate that if the signal strength of the full-bandcell phone signal blocker is too high, it will affect the normal thinking of the candidates who register in the examination room.

As we all know, radio waves are easily transmitted in the air. While the full-screen segment signal blocker is used to isolate the base station signal in a certain area and achieve its limited purpose, it also affects health to varying degrees. Therefore, the full-screen segment signal blocker must be used with caution.

Nowadays, there are many areas around us that are strictly prohibiting the use of mobile phones, especially those places with information security requirements such as examination sites, corporate offices, classrooms, factories, companies, etc. In the past, in addition to putting mobile phones in the signal shielding cabinets of the security department in advance, these areas can also install mobile phone signal blockers. Cell phone signals can appear in different places, everywhere, such as Wi-Fi signals and other signals exist everywhere, so installing a cell phone signal blocker can effectively block them. Without a mobile base station, the mobile phone will not be able to receive information. At this time, you are less likely to have the mentality of playing with your mobile phone, and you can quickly improve your personal skills and achieve your desired goals. The emergence of mobile phones has provided a very good communication tool for the general public, which has brought the distance between us closer and added great convenience to our daily lives. However, with the increasing popularity of mobile phones, most people have their own mobile phones. Mobile phones have now developed to the level that people do not leave their phones, but this has also added great threats to many special places. Therefore, the market for cell phone signal blockers has also emerged. If you want to choose a good signal shielding device, you need to understand how the device can achieve the best effect in each occasion.

If you want to maximize the actual effect of the cell phone signal jammer and use it in different venues, the operation method is as follows:

1. Use in a fixed area:

(1) Professional technicians use spectrum analyzers to accurately detect the network signal frequency of the control site in advance, and then adjust the output frequency of each frequency band of the mobile phone signal jammer according to the data information, so that the output data signal of each frequency band of the cell phone signal jammer can be more targeted, and the frequency band module can be used at the scene to give full play to the maximum effect.

(2) Place the cell phone signal jammer in a higher position. When the wireless antenna rises slowly, the shielding signal will cover more areas.

2. Mobile site installation:

(1) The output frequency of each module is adjusted. In addition to the self-use frequency to maintain the internal employee communication application, ensure that the output frequency of all modules can be seamlessly connected.

(2) When driving fast, insert the cell phone signal jammer in the middle of the transport team. If there are many cars, it is best to use several cell phone signal jammers in combination.

Communication technology is developing faster and faster, and 5G technology has been basically popularized in recent years, but do you know what is the working principle of wireless wifi signal jammer?

The working principle of mobile communication technology is that within a certain frequency range, the transmitting wireless network equipment and the base station communicate through electromagnetic waves, and transmit data and sound at a certain serial port baud rate and modulation method. The normal operation of the mobile phone is to send the working frequency to the base station, but there is a voice call requirement. First, according to the request report, according to the specific situation of the peripheral channel of the terminal, it is allocated to the mobile phone service channel, so that the mobile phone jumps to the service channel to realize voice calls and transmit data. At the same time, wireless communication must ensure sufficient frequency stability in order to better receive and communicate.

According to the above principle, the several major modules of the wireless wifi signal jammer are composed of switching power supply, scanning control module, segmented RF module, amplifier module, transmitting antenna unit and other parts. After the signal jammer's transmitted scanning signal passes through the inverter, it enters the oscillator and is adjusted to the mobile communication working frequency band, and then amplified by the power amplifier and controlled by the voltage regulator. After amplification, the frequency deviation signal is emitted into the air in the form of electromagnetic waves. Because the frequency deviation signal generates error code interference in the mobile phone's received message signal (increasing the noise signal ratio to the device threshold), the mobile phone cannot receive the normal data transmitted by the base station, so that the mobile phone cannot establish a normal connection with the base station, thereby causing the mobile phone to leave the base station communication network. The mobile phone manifests as the phenomenon of no network signal and no service system, achieving the blocking effect.

The working principle of the wireless wifi signal jammer is to scan the low-frequency working frequency of the channel to the high-frequency scanning at a certain speed during operation. The scanning speed can also generate error code interference in the mobile phone's received message signal, and the mobile phone cannot detect the normal data transmitted from the base station, so that the mobile phone cannot establish a connection with the base station, achieving the effect of shielding the mobile phone signal, and the mobile phone manifests as the phenomenon of network search, no signal, and no service system.

The interference output power of the wireless wifi signal jammer is certain, and the shielding radius of the unobstructed space is determined by the path loss and the receiving base station signal pulse signal. In order to achieve the interference of the mobile phone signal jammer on the mobile network, it is necessary to ensure that the signal field strength emitted by the jammer exceeds the field strength of the mobile signal in the interference area. The closer the interference address is to the base station, the higher the field strength and the lower the effective interference area. On the contrary, the farther the interference address is from the base station, the weaker the field strength and the more effective interference areas.

It is not difficult to see that within a certain signal strength, the interference range depends on the field strength in the interference area. No matter how powerful the wireless wifi signal jammer is, as long as the signal strength is constant, as the distance increases, the interference signal strength will gradually decrease, thereby losing the interference level. The following is a comparison table of distance and path loss. Then the wireless wifi signal jammer derives the channel output power, base station signal pulse signal, and coverage line gain value to determine the theoretical coverage radius with practical value.

In today's daily life, various types of cell phone signal blockers continue to emerge, and we don't know how to choose, such as the examination venues of this year's college entrance examination, the camps of new project development, etc. But in fact, not all new products are suitable for us to use in the venues we want. Some new products are private, so they are not suitable for us to use in other fields. There is a very special wireless wifi signal blocker, which also appears in front of us. Its name is wireless wifi signal blocker. What are its advantages?

Wireless signal blocker

Whenever we use a wireless signal blocker, you will see that no matter where we are in a fixed space, as long as the switch of the signal blocker is turned on, no one can find your wireless signal. In other words, you can't use your mobile phone when using wireless signals.

What are the advantages of wireless signal jammers? The following is an explanation of the advantages of wireless signal jammers by Shiji Tiancheng editor:

1: Wide range of use

Wireless signal jammers are mainly used in examination venues, and can also be used in prisons, gas stations, military, petrochemical plants, detention centers, courts, cathedrals, public libraries, student dormitories, special and confidential meeting rooms, etc.

2: Strong targeting

Wireless signal jammers are mainly used in this year's college entrance examination, postgraduate examinations, self-study examination venues, and various major college examinations and various junior high school examinations. Schools, technical secondary schools, vocational high schools, prisons, detention centers, conference rooms, etc. use mobile phone communications, text messages and collusion

Three: Diversification of shielding signals

Effective shielding: CDMA/GSM/DCS/PHS/TD-SCDMA/WCDMA/WIFI/TD-LTE/FDDD-LTE/5.8G

Four: Model advantages

1. Use high-dispersion aluminum alloy profile shell, low operating temperature, stable shielding effect

2. Built-in silent turbo fan, low working noise.

3. Separate power adapter, 12V/24V DC power supply, convenient for vehicle-mounted mobile work.

4. The wifi antenna is externally set, the appearance of the unified port is more beautiful and decent, and it has an anti-loosening design. The wifi antenna and the host have marked working frequency bands for easy one-to-one correspondence.

Cell phone signal blockers can interfere with and block major mobile phone signals in China, such as: 2G, 3G, 4G, 5G, GPS, WIFI, 2.5G. Now the widely used 5G signal can also be blocked normally. It can be used in many institutions such as: school examination rooms, prisons, guards, banks, conference rooms, military and other places. In order to ensure the fairness of the examination, many examination rooms have also installed such equipment, and some simulation examination rooms have also purchased this equipment as a necessary equipment sequence. So the question is, there are still many people who don’t know how to choose the right cell phone signal blocker for themselves.

1. Choose a cell phone signal blocker manufacturer and get first-hand sources

① Compare prices and choose a few reliable manufacturers to investigate the quality, technical means and brand of the products;

② Check the manufacturer’s technical personnel and technical use plans on the Internet to get a preliminary understanding and communicate, and listen to technical explanations;

2. On-site test of actual effects

Choose the best products from these three companies to enter the on-site car market, and then compare the test results to select the best equipment;

3. Investigate the actual product case effects

① After testing the product, you can go to several companies that are using this product for inspection;

② During the inspection, it is best to bring the mobile phone into the shielding area after approval to verify the shielding effect.