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Why the cell phone jammers are illegal in most countries? I am a fan of cell phone jammers, I bought the cell phone jammers from a cell phone jammer shop http://www.jammerall.com/ . I bought a pocket size cell phone jammer and a medium power cell phone jammer. They are very good, and help me to bolck the annoying phone calls in the Lib, Lab, meeting room, and hospital. But there is a problem, someone told me it is illegal in most countries, could you tell me the reason? Why i can not use the cell phone jammer? I think it will be very helpful for me.
Best regards,

If you are using jammers for jamming someone else phone then obviously its illegal. I think you can only use jammers in personal property.

What is the range of cell phone jammer device?

Hi rogwilliam,A mobile phone jammer is an instrument used to prevent cellular phones from receiving signals from base stations. When used, the jammer effectively disables cellular phones. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected.It's legalized use in London,UK.