In the four Monterrey churches, cell phone jammer (the size of a paperback) made in Israel are hidden in Madonna's paintings and statues of saints.
Japan allows portable jammers to be installed in public places such as theaters and concert halls, but only with government-issued approval. Last week, the French industry minister decided to allow cinemas, concert halls and theaters to be installed, subject to regulations, so that emergency calls can still be made.
Tokyo-based Medic Inc. sold thousands of Wave Wall GSM jammers before the government stepped in and regulated their use through live performances.
The Catholic Margarita Escobedo (Margarita Escobedo) visits church at least twice a week and works as a volunteer in San Genaro. She said she would welcome interferers into the community where cell phones get annoying.
Jammers are usually small devices that plug into a lighter connector on a vehicle that send radio signals that can cause excessive power or drown out many weak signals such as GPS and other signals.
The principle of operation of a signal jammer is similar to that of a radio jammer, and the signal it sends corresponds to the operating frequency of the cell phone. This creates enough interference to prevent the call from connecting to the phone. There are currently two types of wireless jammers. The first category is usually smaller devices that are used to block the signal sent by the cell phone tower to any cell phone. The blocking frequency is between 800MHz and 1900MHz. Most devices using this technology can block signals within a 30 foot radius. Cell phones in this area show no signal at all.
Now you can politely tell them to shut up and go away, or you can buy cell phone jammers and turn them off yourself.
Unfortunately, many people (especially prison guards) continue to gain momentum because they want to believe that new high-tech products can solve their problems. In addition to petitioning the FCC to set rules, many prison administrators have supported a bill requiring the FCC to authorize the use of cell phones in prisons.