[guardian-dev] signal without sim ?

Natanael natanael.l at gmail.com
Thu Jan 9 11:44:30 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.

More information about the Guardian-dev mailing list