OR: Put phone in microwave and set it for a slow-roast program. The
   interference will prevent harmful spy-rays from reaching the phone.
   Bonus, you can fast-charge Apple devices using the Microwave thanks to
   #AppleWave!

   On 5 May 2015 12:58:02 GMT+01:00, Georgi Guninski
   <guninski@guninski.com> wrote:

On Sun, May 03, 2015 at 08:51:02PM +0000, jim bell wrote:

     removing the battery may vary among devices. Snowden told people
     visiting him in Hong Kong to put their phones in the refrigerator,
     which
     is a Faraday cage. Also, using a bag is arguably less hassle than
     removing the battery.

     For an RF-shield, I think that using a microwave oven would be much
     superior to a refrigerator.  By definition, a microwave oven is
     designed to contain a huge (1 kilowatt) emission of 2.45 GHz signal
     (close to those of cell phone frequencies, some are 1700-1900 MHz),
     so that humans can live with reasonable safety a foot or so away
     from it.  This implies a shielding of around 60 decibels.I'd keep a
     container of water inside the microwave cavity to absorb emitted
     microwave-band signals.  (And, of course, you should detach the
     power-cord of the microwave, to avoid accidently frying your
     valuable electronics.)As for smartphones, my understanding is that
     most of them don't have detachable batteries.  They do, however,
     have "airplane-mode" function, where (presumably) they are set to
     not emit any signals in any band.  That doesn't mean they couldn't
     hear, or record, audio, or detect RF signals, for recording and
     later transmission.
           Jim Bell   N7IJS             Proudly standing as the LAST
     "Tech-Plus" Ham (Amateur Radio Operator) in the World.

     For maximum safety: ;)
     1. Put the phone in airplane mode
     2. Physically remove the battery
     3. Put the phone in tinfoil faraday cage as explained here
     4. Put the faraday cage in the microwave oven

   --
   Sent from my Android device with K-9 Mail. Please excuse my brevity.