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Jammers began to prevail in various countries
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What you need to know is that GSM stands for global mobile communications system. This is a digital standard that uses a few frequencies a device can only use 850 or 1900 megahertz, and it can still be used in home networks. gsm signal jammer is small device that prohibit the use of portable phones in certain areas.Before buying any of the signal jammers, we need to understand the signal frequencies used in our own country.For example, cell phone signal frequency band,North America (USA, Canada, Mexico) uses the GSM850/GSM1900Mhz band, the UK EGSM900Mhz and GSM1800Mhz bands.
Japan allows the installation of mobile phone jammer in public entertainment venues such as theaters and concert halls, but only if they have a permit issued by the government. Last week, France's Minister of Industry approved a decision to allow installations in cinemas, concert halls and theaters, provided the regulations are in place so that emergency calls can still be made. carried out.
Canada considered authorizing a blockade under similar circumstances. But Industry Canada, which regulates Canadian Telecom, decided not to, saying the devices could be linked to law enforcement and security agencies.
Netline officials sold the first jammer in 1998, and company officials said they sold thousands of handheld gps jammer each year and expanded their business globally, a startling number.
They are far from the builder. These devices are sold all over the world and many vendors sell them on the Internet.
In Scotland, Ronnie McGuire, owner of the electrical and electronics engineering services company, imported cell phone blockers from Taiwan and sold them to hotels, restaurants and bars until a local newspaper report on their activities. It is illegal in the UK.
McGuire said he will still import equipment from Taiwan, but only sell it to authorized countries.
Loreen Haim, director of marketing and sales at Netline, will not disclose how many devices the company sells each year or which country buys the most.
Haim said that in Mexico the main clients are banks seeking to prevent would-be thieves from contacting their associates, and the Mexican government plans to use them in prisons.