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2. Phreaking - Wikipedia

   en.wikipedia.org/wiki/Phreaking

   Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks. [1] The term phreak is a sensational spelling of the word freak with the ph- from phone, and may also refer to the use of various ...

3. Google Voice - Wikipedia

   en.wikipedia.org/wiki/Google_Voice

   Google Voice currently provides free PC-to-phone calling within the United States and Canada, and PC-to-PC voice and video calling worldwide between users of the Google+ Hangouts browser plugin (available for Windows, Intel-based Mac OS X, and Linux). [5] Almost all domestic and outbound calls to the United States (including Alaska and Hawaii ...

4. Stingray phone tracker - Wikipedia

   en.wikipedia.org/wiki/Stingray_phone_tracker

   Stingray phone tracker. The StingRay is an IMSI-catcher, a cellular phone surveillance device, manufactured by Harris Corporation. [2] Initially developed for the military and intelligence community, the StingRay and similar Harris devices are in widespread use by local and state law enforcement agencies across Canada, [3] the United States, [4 ...

5. 1-800-FREE-411 - Wikipedia

   en.wikipedia.org/wiki/1-800-FREE-411

   Service. Callers dial 1-800 (888 or 866)-FREE411 [373-3411] from any phone in the United States to use the toll-free service. Sponsors cover part of the service cost by playing advertising messages during the call. Callers always hear an ad at the beginning of the call, and then another after they have made their request.

6. Martin Cooper (inventor) - Wikipedia

   en.wikipedia.org/wiki/Martin_Cooper_(inventor)

   That first cell phone began a fundamental technology and communications market shift to making phone calls to a person instead of to a place. Bell Labs had introduced the idea of cellular communications in 1947, but their first systems were limited to car phones which required roughly 30 pounds (12 kg) of equipment in the trunk.

7. Communication during the September 11 attacks - Wikipedia

   en.wikipedia.org/wiki/Communication_during_the...

   In 2001, U.S. cell phones did not yet have the photography capabilities that became widespread by the mid-2000s. General public. After the attack, the cell phone network of New York City was rapidly overloaded (a mass call event) as traffic doubled over normal levels. Cell phone traffic also overloaded across the East Coast, leading to crashes ...

8. Blue box - Wikipedia

   en.wikipedia.org/wiki/Blue_box

   Blue box designed and built by Steve Wozniak and sold by Steve Jobs before they founded Apple. Displayed at the Powerhouse Museum, from the collection of the Computer History Museum [1] A blue box is an electronic device that produces tones used to generate the in-band signaling tones formerly used within the North American long-distance ...

9. 112 (emergency telephone number) - Wikipedia

   en.wikipedia.org/wiki/112_(emergency_telephone...

   112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones, and in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police). 112 is a part of the GSM standard and all GSM-compatible telephone handsets are able to dial 112 even when locked or, in some ...