Although Mexico has no laws against devices, it is illegal to use cell phone blockers in private in the United States and most Western countries.
But the tide is changing.
Japan allows the installation of GSM jammer in public places such as theaters and concert halls, but requires a license issued by the government. Last week, the French Minister of Industry approved the decision to establish cinemas, concert halls and theaters, but only if precautions must be taken to allow emergency calls.
Canada has considered allowing blockades under similar circumstances. Industry Canada, which is responsible for regulating telecommunications in Canada, objected to this, saying that these devices may disrupt communications with law enforcement agencies and security agencies, thereby infringing personal freedom and harming public safety.
Netline officials sold the first jammer in 1998. They said they sold thousands of jammers every year and expanded their business to all over the world.
They are far from the only manufacturers. These devices are sold worldwide, and dozens of vendors sell them on the Internet.