He illegally installs a WiFi jammer, the whole neighborhood turns into a white zone!

The ANFR recounts the outcome of its latest investigation around a jamming of mobile networks. Last summer, the agency was contacted several times following reports of jamming by two operators in the same area of ​​Puy-de-Dôme. For several months Clermont-Ferrand district as well as several neighboring municipalities had indeed turned into white areas.

Mobile customers in the area were no longer able to hook up to a network. Very quickly, the ANFR suspected the installation – illegal – of a wave jammer. As the authority reports: “It therefore remained to locate precisely the source of the interference – which in this city of more than 140,000 inhabitants was akin to looking for a needle in a haystack!”. To locate the source of the problem, the ANFR therefore crisscrossed the area with a special vehicle, equipped with a direction finder.

ANFR tells how she found an illegal wave jammer and its owner

On arriving at the scene, the officers nevertheless encountered a problem. The direction finder cannot precisely locate the source of interference. However, the Clermont-Ferrand area in which they found themselves has many bars of buildings, with dozens of homes. They therefore proceed to a series of measurements, which enabled them to make a first observation.

The troublemaker device was indeed a jammer capable of jamming mobile phone networks. After many passages, and by refining the measurements, they end up finding the building in which the manager’s apartment is located. Given the impact of the jamming, and its illegal nature, the agents then requested the assistance of the prosecutor, which made it possible to set up a police operation.

“We park quite far and finish on foot. The building is a 9 story building bar with 2 stairwells. We walk up and down the floors with police officers and identify the apartment, directional antenna in hand, although there is always a part of uncertainty ”, explains one of the ANFR agents.

And to continue, a little further: “A policeman knocks on the door, a lady opens… The BRI takes over the apartment, everything goes very quickly. After a control of the occupants, we enter the premises and look for the jammer. This is a multi-band jammer, installed in a TV cabinet drawer. We immediately unplug it and an OPJ puts it under seal ”

You can see the jammer in question in the image below:

Multiband jammer anfr


As the owner of the aircraft was not present at the time of the search, he received a summons and had to explain the presence of this material. In France, it is strictly forbidden to own or use this type of device. Any offense is punishable by penalties of up to 6 months in prison and a fine of 30,000 euros.

Before being tried, the person concerned also had to pay a tax of 450 euros for “ANFR intervention costs”. He has since given his version of the facts – but the latter did not really convince the ANFR. The latter explains in fact that he simply wanted to prevent his neighbors from connecting to the box in his apartment …

This is not a very credible reason given that his equipment must also be affected by jamming and therefore must not be able to connect to his internet box when the device was on.


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