Takao Someya of the University of Tokyo has built for himself a stretchy, flexible conducting material using carbon nanotubes mixed with a polymer.

ENGADGET: Another flexible circuit project emerges, carbon nanotubes to blame

The technology does exist to cut out mobile phone signals altogether, by forming a Faraday shield, or an enclosure made of conducting material.

BBC: Who, What, Why: How do you stop mobiles in concerts?

The third is to be certain that the temperature gradient which that badly conducting material creates is not frittered away by poor design.

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