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Cell phones aren't allowed into classified environments in US government buildings because they can be remotely turned into listening devices without the owner'

Cell phones aren't allowed into classified environments in US government buildings because they can be remotely turned into listening devices without the owner's knowledge. There's been guidance on this for a long time. The cell phone in your pocket is definitely a surveillance device. Let's be real. You don't keep your phone in a Faraday bag and you probably never will.

ilogik 10y ago
Even if you do, it can still record audio, and transmit it when you take it out
- ryan_lane 10y ago
  The carrier needs to remotely tell the device to enter into a special mode, so a faraday bag would be an effectively method to block this.
  - jvolkman 10y ago
    Until the next time you take it out of the bag to actually use it.
  - kryptiskt 10y ago
    Unless the device is programmed to automatically enter into that mode in the absence of any signal on the assumption that if it is in a shielded location it is likely interesting.
- coldtea 10y ago
  Ever tried recording audio through a closed bag, Faraday or otherwise? I doubt it would be of much use...