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December 30, 2022

Cell Phone Signal Jammers: Use, Manufacture, Sales & Laws

With the development of science and technology today, mobile phones have become one of the most important inventions of mankind, and people use mobile phones all the time. News, Videos, Communications, Payments. The mobile phone has become the carrier of all content. And we can only accept it. But there are always people who don’t like mobile phones. We will call such people “old antiques”.

Although mobile phones are convenient, they often lead to the leakage of privacy. For example, in special meetings and occasions where confidentiality is required, some people will use mobile phones to collect confidential information. And these occasions have made mobile phone jammers a demand, and this demand has also attracted the attention of some law enforcement agencies. Therefore, on a global scale, some countries prohibit the sale of mobile phone jammers. It’s like America.

What is a cell phone signal jammer?

A mobile phone signal jammer is a small box with a signal transmitter, which can be generated at the same frequency as a mobile phone signal, thereby blocking normal communication. This method is similar to a base station, using a disordered base station to occupy the normal channel of the mobile phone. It’s just that this small box has very little power and doesn’t take up a lot of range. Usually, mobile phone signal jammer will adjust different frequencies according to different countries, because the channels used by 4G, 5G signals may be different in different regions. Therefore, mobile phone signal jammers cannot be used globally. The manufacturer must also customize the corresponding signal according to the user’s country.

How to make a mobile phone signal jammer?

Here is a simple signal-generating device. This video roughly explains the basic principle of the mobile phone signal jammer. Of course, this is just a small device, and it doesn’t have much effect. If you are interested in this type of equipment, it is best to buy directly on There will be better prices here.



Schematic of mobile phone signal jammer.

Components Required

  • 555 Timer IC
  • Resistors – 220Ω x 2, 5.6KΩ, 6.8KΩ, 10KΩ, 82KΩ
  • Capacitors – 2pF, 3.3pF, 4.7pF, 47pF, 0.1µF, 4.7µF, 47µF
  • 30pF Trimmer Capacitor
  • LED
  • Coils 3 Turn 24 AWG, 4 Turn 24 AWG
  • Antenna 15 Turn 24 AWG
  • BF495 Transistor
  • ON / OFF Switch
  • 9V Battery


Are mobile phone signal jammers legally safe?

As mentioned above, it is illegal to privately own a cell phone jammer in the United States. You must obtain legal procedures to own and use the device on certain occasions. So if an individual needs this device, it is best to pay attention to the laws of the country to ensure that no one will catch you when using it. The content of the law can be viewed at the following URL.

Can mobile phone signal jammers be purchased on the Internet?

Of course, the Internet is the most convenient channel, which saves a lot of offline things. And Internet purchases have more price advantages. Orders can also be placed via the Internet in Africa.

The best 4 cell Phone jammer models.

Generally, there is no need to distinguish between good and bad mobile phone signal jammers. From the functional requirements, we have summarized the following 5 most popular mobile phone signal jammers.

1. 8 Bands Portable Cell Phone Jammers


If you are looking for a device that covers 4G signal and 3G, 2G signal. This device will be the best value for money. The device can cover 4G LTE and 4G Wimax, so the vast majority of 4G signals will be blocked. GSM signal is already covered. At the same time, the device supports the shielding of WIFI and Bluetooth signals and the shielding of GPS civil signals. It is the most functional and commonly used device within 5 to 20 meters (depending on the environment and signal strength).

2. 10 Antennas Military Jammer


If you are looking for a device that covers 5G, 4G signals. The device meets your requirements. The device can cover the 5G conventional scheme, and the signals below 4G have also been blocked. And the device supports shielding WIFI and Bluetooth signals and also supports shielding 5.8G (WIFI signal).It is the most functional and commonly used device within 5 to 20 meters (depending on the environment and signal strength).

3. Portable Cell Phone Blocker with Cooling Fan

If you are looking for the easiest and cheapest 4G signal jammer. You can try this device. Although it only has 4 antennas, it can support regular 4G LTE signal shielding. 3G 2G signal coverage is also no problem. Although it does not support the shielding of WIFI and GPS signals. It is useful in some cases where the requirements are relatively single.

4. 6 Antenna Portable Signal Jammer Blocker

This 6-antenna device can block regular 4G LTE signals, WIFI signals, and GPS signal. It is also a relatively conventional configuration. But it lacks 4G Wimax. So it is not recommended for European customers to buy it.

How to use a cell phone signal jammer?

Mobile phone signal jammers usually need to install antennas first, and these antennas are usually marked according to their length or number. The user only needs to install these antennas normally, charge the mobile phone signal jammer with a charging device, and then turn it on, the machine will work within 5 seconds after turning it on. At this time, the user can try to use the mobile phone to make a call, and it is normal if a busy signal is encountered.

What is the difference between a GPS, WIFI jammer and a mobile phone jammer?

Like other signal jammers, GPS jammers and WIFI jammers are only different in function, and the principle is the same, but because of their high power, 5.8G jammers must use high-end equipment to produce results, so most manufacturers will require fixed Several devices can support 5.8G.


The mobile phone signal jammer is a kind of security equipment, which is used in special scenarios. Please purchase it selectively according to local laws and regulations.

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