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All I want for Christmas is this mobile phone jammer

A way to turn off others' mobile phones. What a blessed invention!

I want one of these. It's a mobile phone jammer that can quiet down that annoying chatterbox next to you on the plane, train, or automobile.

It's on a little black box called a phone jammer. Illegal in this country, the United States and most of the European Union, the basic version costs as little as £25 in Hong Kong. By sending out a blizzard of radio waves, the cigarette packet-sized gadget will knock out a mobile phone signal within a radius of five to 10 yards. A more expensive version can take out a whole train. Very James Bond.

Give me one now. Please!