From: grarpamp <grarpamp@gmail.com>
   >>>> (or as Snowden demonstrated, put in a fridge to avoid scrutiny and
   >>>> audio capture the best idea.  non-serial tower associations are an
   >>>> anomaly alerted and acted upon.)
   >Faraday cages concept really depend on the freqs they are designed
   >>to inhibit, pressure, sound, radio, optic, etc. Given wide enough
   freqs,
   >one cage does not service all.
   >A fridge has plastec and magnetic gaskets, over maybe 2cm variant
   >gap, so not a complete EM seal (at whichever specifical freqs).
   >And grounding issue. But good at human sound deading.
   >Microwave door shield is closer to cell phone freq shield.
   >If you cannot simply remove the battery preferably, that is.
   >As always, test first. And is easy to find phones to test
   >all phone bands with.
   >TEMPEST.
   Why not wrap the phone in a couple of layers of aluminum foil?
   (Although, it won't shield against audio if that's being recorded even
   while an RF contact does not exist...)
        Jim Bell