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One of the things I remember from the Snowden reporting is that he had the reporters use a freezer as a Faraday cage for their phones.

• labster 3y ago
  Talk about a cold reception.
• sneak 3y ago
  No, they used it as acoustic insulation for the microphones and optical insulation for the cameras. The signal blocking, if any, is just a bonus, but isn't to be relied upon.