Gadżety

http://www.jammer-buy.com/blog/n-30.html
Should be installed where the only portable jammer some of the local religious temple or church, of course, big companies if they think time is money, employees may not use cell phones so they should work. GSM jammers can also be installed in some large theatres and cinemas for private or concerts.

http://www.jammer-buy.com/blog/n-29.html