[guardian-dev] signal without sim ?

shmick at riseup.net shmick at riseup.net
Fri Jan 10 10:23:30 EST 2014

> On Thu, Jan 9, 2014 at 5:36 PM, shmick at riseup.net <shmick at riseup.net> wrote:
>> Hans-Christoph Steiner:
>>> Airplane mode is implemented in software, so there is no guarantee that it is
>>> actually turning off any radios.  This is the same case as the power buttons
>>> on phones: they don't physically cut power to the device, so many devices
>>> don't really turn off at all when you "turn them off".
>> can the lay person test this with off-the-shelf products ?
>> can you recommend decent irc channels and/or mailing lists dedicated to
>> mobile networks ?
>> thanks for answering albeit off-topic to list
> You can build a Faraday's cage with materials at home (aluminum foil
> and various other materials), and RF analyzers are readily available
> that you could put next to the phone within that cage. If it shows any
> activity, your phone is likely the source.
i should take note from my childhood cinema
im thinking gene hackman in independence day but minus the blow up my
house and rest of the block button ...

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