Is it illegal to jam someone phone?
Jamming someone's communications sounds like something straight out of science fiction. But with advancements in cellular and Wi-Fi technology, it's quickly becoming science fact.
Before you go out trying to shut down your neighbor's cell service, though, you should understand that, you should understand that jamming cell phones and GPS devices is not legal under FCC rules.
It doesn't matter if you're a teacher who's fed up with students using their cell phones in your classroom, or a train passenger annoyed at people talking on their cell phones.
In most countries, it is illegal for private citizens to jam cell-phone transmission, but some countries are allowing businesses and government organizations to install jammers in areas where cell-phone use is seen as a public nuisance.France legalized cell-phone jammer gps in movie theaters, concert halls and other places with performances. France is finalizing technology that will let calls to emergency services go through. India has installed jammers in parliament and some prisons. It has been reported that universities in Italy have adopted the technology to prevent cheating. Students were taking photos of tests with their camera phones and sending them to classmates.
With phones ringing in movies, weddings and classrooms, it's no wonder people want to tone down the intrusion.
Jamming a wireless signal
Cellular signals are typically robust, but in general all a jammer needs to do is cause enough errors in the messages received by either the cellphone or the tower to overwhelm their ability to correct them.
Though jamming wireless signals can be done in a number of different ways, there is one general approach that works in just about all cases: add noise.
This type of jamming is sometimes called “denial of service” (DOS).
Other jamming techniques may target the specific workings of the technology it is trying to disrupt, but if you can generate a garbage signal of sufficient power at the correct frequencies, you have a jammer.