http://cellphone-jammers.com/ but be aware that they are illegal in many places for nongovernmental users - https://en.wikipedia.org/wiki/Mobile_phone_jammer
http://cellphone-jammers.com/ but be aware that they are illegal in many places for nongovernmental users - https://en.wikipedia.org/wiki/Mobile_phone_jammer>>> yes i looked into buying one. lots of hurdles. so i doubt there where any deployed thousands of yards and outside a 4 mile perimeter. and no ones cell ohone worked. you would hear a lot more complaints especialy to the providers.