How to inhibit the signal of a mobile phone?

The technology to inhibit a mobile phone exists and, if one has the soul of a saboteur, it can be purchased on the Internet for a few tens of dollars in the market. A frequency jammer consists of a small device that emits an electromagnetic wave that cancels the frequency of the mobile phone in an area of ​​tens of meters. Their use is usually restricted by law since they are used by state forces for protection work or by organized gangs of thieves in the theft of vehicles or houses.

There is also the possibility of acquiring the technology for the opposite. A frequency inhibitor detector allows detecting a burglary attempt when intruders want to disable an alarm in a home for example. It is a service that alarm companies market, reaching the contradiction that they sell it as an additional service to cover a vulnerability in their own protection systems.

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The mobile phone jammer not only work for mobile telephony but can also cancel the WiFi signal, GPS, radio, road radars, etc. But not all electromagnetic signals are equally easy to inhibit. Communications that use several radio transmission channels at the same time are more robust to attacks.

The inhibition of electromagnetic signals is very close to listening or spying on communications, reaching its maximum expression with the so-called ECHELON network that brings together English-speaking countries in an immense global communications listening network. It was conceived in times of the cold war and continues to be used to fight terrorism and industrial espionage, causing suspicion in civil society for its lack of legality and transparency.

Raspberry Pi 4 HDMI is interfering with its own WiFi

Upgrading a popular line of products may sound like a good idea, but adding bigger / better / faster parts to an existing product can lead to unforeseen problems. For example, putting a more powerful motor in an existing vehicle platform seems to work at first until people report that the increased torque is bending the frame. In the Raspberry Pi world it seems that the “updated engine” in the Pi 4 causes the WiFi to stop working under certain circumstances.

Enrico Zini noticed this problem and tried to reproduce exactly what caused the WiFi to fail. After testing various Pi 4 cards, power supplies, operating system versions, and a host of other variables, the cause was isolated on the screen resolution. Apparently the WLAN fails with the setting 2560 × 1440 with HDMI. While you might think that a SoC might not be able to handle high resolution, WiFi, and everything else that tiny computer has to do all at once. However, the root cause seems a little more interesting than a simple problem with system resources.

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Mike Walters checked for a radio frequency problem with a HackRF on a Twitter post on this issue. It turns out that at this screen resolution, the Pi 4 emits RF noise that is exactly in the range of WiFi channel 1. It appears that the Pi 4 is acting as a wifi jammer for itself.

This story is pretty new, so hopefully the Raspberry Pi Foundation is aware of the problem and is working on a fix. For now, however, it might be best to use a slightly lower resolution if you encounter this problem.

Are all wireless networks susceptible to interference?

There is a lot of buzz about enterprise access networks being “fully wireless” as the increased throughput and range of next-generation 802.11n WLANs become available in IEEE standard products.

One consideration for using unlicensed radio waves solely for corporate LAN access is the impact of interference on network availability. Jamming is a form of wireless denial-of-service attack in which a single device transmitting at a higher power than those nearby blocks the connection to lower-powered devices. If you put all of your broadcast eggs in one wifi basket, a malicious paper jam can bring your access network to its knees.

Fortunately, to date we haven’t heard much about deliberate, unintentional jamming attacks on any particular company or hot spot. But once businesses go wireless, I wonder if that raises serious security concerns.

Inadvertent interference is common in cell-based Wi-Fi network systems. It emits from bluetooth devices, microwave ovens, cordless phones, Wi-Fi access points in a neighboring office, and other competitors for unlicensed spectrum. You can use spectrum analyzers such as those from Cognio and its many resellers and OEMs to identify and locate such sources of interference. Basically, you then use Ankle Express to deactivate them.

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But what if criminals come into play? jammer device exist today primarily for legitimate testing purposes. If the jammer is within FCC Part 15 power limits – 1 watt plus 6 dBi antenna gain, or around 4 watts – a legitimate device can easily broadcast most Wi-Fi devices, which typically emit around 100 milliwatts of power Craig Mathias, Principal at Farpoint Group in Ashland, Mass.

“There are a number of jammers on the market that can completely shut down 802.11,” says Mathias. “You need some kind of radio that can pinpoint where the radiation source is coming from. If the jammer is illegal [broadcast at levels above FCC limits] it can be distant and difficult to fix.”

Portable jammers are particularly convenient for some special groups of people

It’s really boring to be tracked now. There are various tracking devices that disrupt the lives of normal people. Although it’s really convenient, it can also harm people and bring them privacy threats. Now, if you If you want to get rid of this situation, then you can come here and you will find that jammer-mart is a good choice, and you can find the best here.

Mobile phone select Bluetooth mobile phone signal GPSL1 GPSL2 GPSL5 3G jammer View product table

And the normal use of many wifi signal jammer and tracker on the market are cell phone signal trackers and GPS trackers, so if people need to cut off GPS from signal tracking and cell phone trackers, you can directly come here to view this feature design For specific examples, you can come here to learn more about this “Portable Signal Option Bluetooth 3G Mobile GPSL1 GPSL2 GPSL5 Jammer”, and you can see the detailed information of this 3G mobile GPS jammer.

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Then, you can briefly take a look at this optional portable signal jammer. This handheld WiFi 3G GPSL1 GPSL2 GPSL5 blocker has the function of cutting off GPSL1 GPSL2 GPSL5 signals and 2G 3G WiFi cell phone signals at the same time. However, when using other designs, you may have to make a real decision based on the interference of the frequency band. Therefore, since this optional 3G Bluetooth GPS phone also includes a stuck car charger, it is also a good choice for people who want to use GPSL1 GPSL2 GPSL5 3G Bluetooth mobile phone jammer.

In addition, the portable GPS mobile phone blocker also has a built-in fan. Due to the heat dissipation system, the GPS signal of the handheld mobile phone always maintains a good working condition and will not cause high temperature. In addition, the portable handheld GPS signal blocking device is also designed with a car charger, which can be conveniently used in the car, which is very convenient and easy to use. In addition, the GPS jamming application is also very easy to use and can be used in many places where you go out as well as meeting rooms, classrooms and other places.

In addition, there are many other types of portable signal jammers, they are designed to have this function, if you need a 3G GPS mobile phone jammer or other types of signal blockers, please sell them here.

Car theft: jammers, a new weapon for car thieves

This is not a rumor or even a potential risk (like a security breach), but a reality: car thieves have a new way of behaving and it’s unfortunately very simple and very effective. The National Police released an official press release on May 19, 2020 warning of “frequency jammers” that allow thieves to block the automatic closing of car doors … to safely search or steal them.

A simple, inexpensive box for a few tens of euros

The signal jammer is neither complicated nor large: it fits in one hand and only blocks the signal that the remote control sends to the car when the doors are closed (automatic remote locking). The signal is encrypted, the car remains open.

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What worries the authorities is that it is extremely easy to get this type of jammer on the internet and in parallel markets. Their prices also make them dangerous: barely fifty euros or accessible to everyone. Suddenly their shadow multiplies in Ile-de-France and all over France.

The only solution: vigilance

If the police can watch, they arrested three young people in the act on May 12-15, 2015. The number of cars and jammers in circulation is far too many for the police to check. And there is nothing to be done about these boxes.

To do nothing except … be vigilant as always. The problem is that with a remote lock you are more likely to trust not to check that the doors are actually closed: generally, you press the button as you step away from the vehicle and without returning.

But thieves watch with their boxes. However, if you are vigilant and check that the doors are actually closed, there is nothing they can do: if they are not closed, you can always press the button again to close them or stay near the vehicle while they are closed are not close.

Fight against employees who use GPS jammers

From the paranoid conspiracy nut to the woman who is afraid of being followed by the employee who doesn’t want to be followed by her boss, the use of devices called GPS jammer is increasing. They are easy to purchase online. You can even find them on sites like eBay. Many people who use them likely assume they are legal and don’t bother to investigate the laws around them. But as an employer, how do you combat and spot employees who use GPS jammers?

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What is a GPS jammer?

What Exactly Is A GPS Jammer And How Do They Work? A GPS jammer is a device that uses radio frequencies to transmit a signal that blocks, interferes, or interferes with GPS systems. These devices interfere with all aspects of GPS, including navigation and tracking.

The devices are usually small and most of them are easy to install. A user just needs to plug it into the lighter or car charger port (do cars still have a lighter socket?) And make sure the device is near the GPS tracker so it can interfere with the signal. It takes less than half a minute to turn them on, which makes them attractive to criminals and employees as you can simply plug them in when needed and remove them for the rest of the time.

How do I know an employee is using a GPS jammer?

The good news is, if you have one or more employees trying to use a GPS jammer to disrupt your fleet tracking system, you know. While your drivers may think the illegal jammers are making them invisible, they are instead paying more attention to their behavior.

When an employee uses a GPS jammer to jam the GPS signal, it will show up on the live tracking map or trip history map as a paused or missing trip. If you only connect your jammer during part of the journey, a line will appear between when the jamming started and when the device was turned off. Some later GPS tracking devices even have GPS interference detection. You can also create an exception rule that checks for GPS signal errors and triggers an alert or email when GPS interference occurs.

Once you discover that an employee has disrupted the GPS tracking, you can confront them. They also have a record of the GPS malfunction for disciplinary action like firing the abusive employee for cause.

Final thoughts on GPS jammers and staff

While GPS jammers are illegal, the devices are inexpensive and easy to obtain, especially online. The FCC relies heavily on the public to report the devices, but many people are unaware that it is illegal. Studies of the number of drivers using GPS jammers to hide their whereabouts from employers are inconclusive. However, their use appears to be increasing.

While most GPS jammer users are unlikely to use them to hide illegal activity, the reason behind buying, selling, or using the devices illegally is for public safety reasons. GPS jammers interfere with communication systems, navigation systems, and tracking systems, including emergency services and aviation.

It’s interesting that workers who use them think they can fool their bosses. Instead, employers can easily monitor when and if an employee is using GPS interference and record all incidents. If you are concerned that your drivers are tempted to use the devices, it is important that you monitor your reports and confront the staff who catch you.

You can also let your drivers know that GPS jammers will not help them hide from GPS tracking and that the devices can result in not only termination of their employment but also fines and jail terms for violating federal law. Ultimately, your drivers will find that the devices are simply not worth using.

Take away your mental space with a cell phone signal blocker

It is so annoying that we get buried in all kinds of work emails or different kinds of massages, plus you have to deal with all the crank calls during your important time. Now you don’t have to endure such situation anymore because high power cell phone signal jammer will help you to keep all those calls or messages from cranking once you turn it on.

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No one can resist natural regulation and their faces will change and lose their charm. When a person is no longer young and beautiful, he can still be blessed with knowledge and experience. It’s time to clear your metal space with a cell phone signal blocker and do something you love. An older person is always respectable because he acquires wisdom over time, which can enlighten the young. Appearance will always disappear, but wisdom will win and this is the most precious thing. Don’t let your wasted time, just live and learn with multifunctional cell phone signal jammer, you can keep phone noise away and keep peaceful time with you and your friends or family as you like.

Think about the last time you felt a negative emotion – like stress, anger, sadness, or frustration. What was going through your mind as you went through this negativity? Was your mind cluttered with thoughts? Or was he paralyzed, unable to think? It is so annoying that we get buried in all kinds of work emails or different kinds of massages, plus you have to deal with all the crank calls during your important time. Now you don’t have to endure such situation anymore because high power cell phone signal blocker will help you to keep all those calls or messages from cranking once you turn it on. Where can you find one?

The next time you find yourself in the middle of a very stressful time, or feeling angry or frustrated with the continuous phone calls when you are meeting or doing important business, stop yourself. Yes, that’s right, stop. Then turn on the button of the high power remote control cell phone signal blocker. Whatever you do, stop and sit for a minute with the jamming kit. While you are sitting there, completely empty your space of metal with it, you will return the peaceful time. It’s a wonderful way to give it a try.

The man set up a jammer to interfere with the aircraft GPS signal? The truth is…

GPS navigation signal is an important technical guarantee for aircraft flight safety. The flight crew of a civil airliner that landed at Liuzhou Airport not long ago reported that the aircraft was about 8 kilometers above the runway when it was descending and preparing to land. GPS signals began to be interfered by radio until the distance About 4 kilometers above the runway, the GPS interference signal disappeared, and the length of time the passenger aircraft was interfered on different flights was different. The shortest time for the passenger aircraft GPS to be interfered was 60 seconds, and the longest time was 125 seconds.

The reporter learned from the Liuzhou Radio Monitoring Center that recently, the center used technical means to jointly enforce the law with relevant departments. This case of civil aviation passenger aircraft GPS interference was seized and handled, eliminating potential safety hazards.

It is understood that on June 28, Liuzhou Airport submitted a radio interference complaint form to Liuzhou Radio Monitoring Center: The GPS signal was severely interfered by the GPS signal while the civil airliner was preparing to land on the runway of Liuzhou Airport recently, resulting in loss of GPS signal and interference. The worst airliner lost GPS signal for up to two minutes. The GPS signal was interfered with and affected the approach and landing of the aircraft. Some flight crews adopted the termination of the RNP approach procedure and used visual control of the aircraft to land, which seriously affected the approach and landing of the civil aviation aircraft and brought security risks to flight safety.

After receiving the complaint, the Liuzhou Radio Monitoring Center dispatched monitoring personnel and dispatched mobile monitoring vehicles to carry out carpet radio monitoring and interference investigations on the area under the GPS interference route. It was found that the source of the interference was set by the Liuzhou Power Supply Bureau on Ruilong Road. A GPS signal jammer in a second-hand car warehouse next to the Fort Substation. After questioning, the owner of the car warehouse confessed that the jammer was purchased from Taobao and it was used to shield the GPS signals of cars in the warehouse to prevent vehicle positioning information from being discovered.

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On July 21, Liuzhou Radio Monitoring Center, Municipal Public Security Bureau Airport Branch, and Liuzhou Airport launched a joint operation to investigate and deal with the illegally installed GPS signal jammer in the warehouse. The staff of Liuzhou Radio Monitoring Center and the Public Security Bureau conducted a preliminary inquiry and investigation of the warehouse owner. After that, the public security police seized the GPS signal jammer according to law and brought the warehouse owner back to the Public Security Bureau for further investigation.

At this point, the GPS signals of all civil aviation aircraft that landed at Liuzhou Airport have returned to normal, and the radio signals that interfered with the GPS positioning of the civil aviation aircraft have completely disappeared, and the hidden dangers affecting aviation safety have been eliminated.

On the necessity of using mobile phone signal jammer in important occasions

Today’s mobile phones are becoming more powerful and smarter. You can not only make calls, send text messages, but also social chat through your mobile phones. Some social software is also more powerful, you can do live broadcast, you can receive video with the other party on the spot, and you can also record… Then there is a kind of rigor in important occasions, if it is some business secrets to hold meetings or discuss For any plan, in order to avoid the transmission of internal and external messages, and to protect the security of this plan, a cell phone jammer can be used.

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Commercial competition is getting stronger and stronger, especially some commercial secrets. After all, the competition is fierce. When there are any new tricks or new things invented, or when there is a commercial plan, it must be kept secret from the outside. It cannot be ruled out that internal staff have been bought by other companies. In this case, when discussing plans or meeting in secret, employees may leak secrets with other companies. You can use a mobile phone signal jammer. With the jammer, you can avoid internal leaks.

When discussing important secrets, a mobile phone signal blocker can be used just in case. If there is a recording, it can be blocked, and the order of the meeting can also be maintained to avoid the interference of the mobile phone. Chengdu Saiyue Communication Technology Co., Ltd. has focused on the development, production, sales and engineering installation of jammers for more than 10 years. It is one of the few most professional signal jammer manufacturers in China. The Chengdu Saiyuetong brand wireless signal jammer system provides mobile phone jammers | GPS signal jammers | wireless WIFI mobile phone signal shielding | one-stop signal shielding solutions for prisons, detention centers, schools, examination rooms and other important places.

Anti-drone technology is necessary in the future

Anti-UAV technology, why is it essential for airports.

With the dramatic increase in drone penetration in the past few years, controlling the sky above us has become an additional responsibility. UAV detection solutions have become very important, not only can detect long-distance UAVs, but also access a variety of potentially important information, such as controller location and UAV model.

Who are those organizations that rely on drone detection? The police force certainly bears a great deal of responsibility when tracking illegal activities involving drones, but the airport (probably more than any other type of venue) must fully control the sky above its location. As drones increasingly enter the airspace around airports, this reality has become more relevant in recent times.

Last summer, a drone entered the airspace near Gatwick Airport, causing five aircraft to be diverted and completely closed the runway.

In addition to endangering the safety of passengers on board, taking up air traffic control time, and causing inconvenience to people who eventually misplace or put their journey on hold, it can be said with certainty that the interruption of drones will eventually cause great losses to airlines. All these problems are caused by a relatively small unmanned aerial vehicle, which emphasizes the importance of airport drone detection.

According to this BBC article, the British Airprox Commission conducted an investigation into the Gatwick incident and concluded that the incident caused as many as 130 deaths.

Time for action

The truth is not a lie. According to Airprox’s data, in the last two years of records, 168% of aircraft errors on drones and aircraft. The drone caused chaos around the airport, stopped flying, almost lost the aircraft and caused delays.

In December 2018, a drone report at Gatwick Airport grounded all flights and disrupted thousands of passengers within 24 hours. Fortunately, there is a solution to these problems and return more control to those who work on the ground.

UAV automatic detection and defense solutions can let people know those who pay attention to the sky. UAVs can now be detected up to 20 kilometers away, and early warning can give precious time to prepare and deal with any type of UAV threat.

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The ability to identify the location of the controller gives the airport the opportunity to more effectively liaise with law enforcement agencies to take action against those who violate its airspace. It can identify a specific drone model and the actual serial number of a single drone that has been detected. This is enhanced by the flow of information to be able to pinpoint the heading, speed and altitude of the drone-all potentially key facts that could affect the actions taken by air traffic control.

Portable drone jammer has become a popular anti-drone technology option, suitable for police forces that require drone detection on the move, but when it comes to airports, the fixed version may see the most demand .