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2. Radio scanner - Wikipedia

   en.wikipedia.org/wiki/Radio_scanner

   A scanner (also referred to as a radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases. The term scanner generally refers to a communications receiver that is ...

3. Stingray phone tracker - Wikipedia

   en.wikipedia.org/wiki/Stingray_phone_tracker

   The StingRay is an IMSI-catcher with both passive (digital analyzer) and active (cell-site simulator) capabilities. When operating in active mode, the device mimics a wireless carrier cell tower in order to force all nearby mobile phones and other cellular data devices to connect to it. [ 9][ 10][ 11] The StingRay family of devices can be ...

4. Police radio - Wikipedia

   en.wikipedia.org/wiki/Police_radio

   Police radio. Police radio is a radio system used by police and other law enforcement agencies to communicate with one another. Police radio systems almost always use two-way radio systems to allow for communications between police officers and dispatchers . Most modern police radio systems are encrypted, and many jurisdictions have made ...

5. A new technique can detect newer 4G 'stingray' cell phone ...

   techcrunch.com/2020/08/05/crocodile-hunter-4g...

   Newer cell site simulators, called “Hailstorm” devices, take advantage of similar flaws in 4G that let police snoop on newer phones and devices. Some phone apps claim they can detect stingrays ...

6. Amid protests, US police scanner apps and others saw record ...

   techcrunch.com/2020/06/01/amid-protests-u-s...

   The Police Scanner app saw the most downloads of the group, with 19,000+ on Friday, nearly 24,000 on Saturday and 35,700+ on Sunday. However, the daily active user count for the Scanner Radio ...

7. The Story Of Flint Police Operations, A Group Saving A Crime ...

   techcrunch.com/2012/03/23/the-story-of-flint...

   They use free services readily available online. The only special requirement, which the FPO seems to have plenty of, is a passion for their hometown. Flint Police Operations uses scanner traffic ...