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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. 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.

  4. Stingray use in United States law enforcement - Wikipedia

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

    The complaint alleged that the department had been operating stingrays without proper licensing and asked the FCC to intervene. The complaint further claimed that use of the device, which can disrupt cell networks, disproportionately affected African-American neighborhoods in Baltimore. The stingray had been used by Baltimore police thousands ...

  5. Governor's order to eliminate cell phones in public school ...

    www.aol.com/governors-order-eliminate-cell...

    Executive Order 33 directs the state education and health departments to work with parents, educators and community leaders to devise a policy for restricting students’ use of cell phones in the ...

  6. Call blocking - Wikipedia

    en.wikipedia.org/wiki/Call_blocking

    Call blocking, also known as call block, call screening, or call rejection, allows a telephone subscriber to block incoming calls from specific telephone numbers. This feature may require an additional payment to the subscriber's telephone company or a third-party. Call blocking is desired by individuals who wish to block unwanted phone calls.

  7. Cellphone surveillance - Wikipedia

    en.wikipedia.org/wiki/Cellphone_surveillance

    U.S. law enforcement agencies can also legally track the movements of people from their mobile phone signals upon obtaining a court order to do so. [ 2 ] These invasive legal surveillance can cause a change in public behaviors directing our ways of communication away from technology based devices.

  8. Piggybacking (Internet access) - Wikipedia

    en.wikipedia.org/wiki/Piggybacking_(Internet_access)

    Also known as tethering, one can interface to their phone either wirelessly using Bluetooth or Wi-Fi or wired via cable allowing access to the Internet anywhere there is a cell network signal. Many jurisdictions have been experimenting with statewide, province-wide, county-wide or municipal wireless network access.

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