In United States, smartphones are an essential life "companion". It plays a very important role in people's lives. Without it, it is impossible to imagine how bad life will be. This is the reason why we Americans like to assemble parts for mobile phones. Therefore, some user's request, the use of the smartphone should be as smooth as possible at anywhere .
Since people's lives are so inseparable from smartphones, why are a lot of people interested in cell phone jammers? The emergence of mobile phones has indeed brought us great convenience. Nothing can be replaced. However, in some places, the use of mobile phones is very disgusting: the conference room leader decides whether to prevent subordinates from playing mobile phones; during class in the classroom Worried that students use smartphones to influence learning; cinema operators are also very interested in smartphone signal blocker, because it can guarantee the quietness of the theater, of course, need to be equipped with public telephones; some retailers are also keen on multiband phone jammers because it can prevent Customers in the store through the network query for the price, resulting in higher returns.
The mobile phone jammer will send its own signal to interfere with or block the reception of the required GSM radio signal. Some jammers will not only block the mobile phone network, but also jamming the GPS signal and the WLAN data network. Does this mean can people buy mobile phones to interfere with the device for free use?
Since the state is monopolized on radio frequencies, only government departments can buy jammers, such as using jamming equipment in prisons to prevent criminals from using their mobile phones for illegal transactions, such as drug trafficking, jailbreaking, etc. Some government officials use mobile phones to interfere. Prevent spy tracking, block remote control bombs, etc. In some EU countries, it is forbidden for individuals to illegally use cell phone jammers, as this will not only interfere with private radio communications, but also block the radios of other important agencies such as police, fire brigade and so on. In addition, emergency calls cannot be sent.
However, in some countries and regions, jammers are approved or used by public agencies. Therefore, mobile phone jammers are used in many cinemas, theaters, churches, and gas stations to prohibit the use of mobile phones. For some high-powered electricians, it is not difficult to make a simple jamming device, so we should not use it for illegal purposes when purchasing the jammer, and it may be confiscated and fined.