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  2. Mobile phone jammer - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_jammer

    Example of a mobile phone jammer, produced by Jammerspro. A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting ...

  3. Stingray phone tracker - Wikipedia

    en.wikipedia.org/wiki/Stingray_phone_tracker

    The Stingray acts as a cellular tower to send out signals to get the specific device to connect to it. Cell phones are programmed to connect with the cellular tower offering the best signal. When the phone and Stingray connect, the computer system determines the strength of the signal and thus the distance to the device.

  4. IMSI-catcher - Wikipedia

    en.wikipedia.org/wiki/IMSI-catcher

    A targeted mobile phone is sent signals where the user will not be able to tell apart the device from authentic cell service provider infrastructure. [16] This means that the device will be able to retrieve data that a normal cell tower receives from mobile phones if registered. [16]

  5. Stingray use in United States law enforcement - Wikipedia

    en.wikipedia.org/wiki/Stingray_use_in_United...

    The use of stingrays by United States law enforcement is an investigative technique used by both federal and local law enforcement in the United States to obtain information from cell phones by mimicking a cell phone tower. The devices which accomplish this are generically known as IMSI-catchers, but are commonly called stingrays, a brand sold ...

  6. I tried an EMF-blocking device to reduce my exposure to ... - AOL

    www.aol.com/finance/tried-emf-blocking-device...

    The device simply starts working when it's plugged in. “The most common feedback we get is improved sleep, more energy levels, fewer headaches, and less brain fog," says Somavedic CEO Juraj Kocar.

  7. US agency probes risks of foreign satellite use by handheld ...

    www.aol.com/news/us-agency-probes-risks-foreign...

    The Federal Communications Commission said Thursday it is investigating if the use of Russian and Chinese foreign satellite systems by U.S. mobile phones and other devices poses security threats ...

  8. Cellphone surveillance - Wikipedia

    en.wikipedia.org/wiki/Cellphone_surveillance

    The Fremont Police Department's use of a StingRay device is in a partnership with the Oakland Police Department and Alameda County District Attorney's Office. [1] End-to-end encryption such as Signal protects message and call traffic against StingRay devices using cryptographic strategies. [6] A typical cell tower mounted on electric lines.

  9. Radio jamming - Wikipedia

    en.wikipedia.org/wiki/Radio_jamming

    Radio jamming is the deliberate blocking of or interference with wireless communications. [1] [2] In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio.