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NSA growth fueled by need to target terrorists

• raganwald 13y ago
  I'm curious: How do they detect the location of a cell phone that is turned off?
  • happypatrik 13y ago
    "Some handsets can't be fully powered down without removing the battery; for instance, some Nokia models will wake up when turned off if an alarm is set." (http://news.cnet.com/2100-1029-6140191.html http://news.cnet.com/2100-1029-6140191.html) I'm guessing that there even might be models with built in battery backup for this kind of functionality.
    • cinquemb 13y ago
      And with that: Cellular devices are designed to transmit some kind of pilot signal even when turned off but with operational battery http://www.endoacustica.com/gsm_interceptor_en.htm http://www.endoacustica.com/gsm_interceptor_en.htm