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  2. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    8. Spy Dialer. Spy Dialer is a free reverse phone lookup service that accesses public databases of registered phone numbers to help users find information on cell phone and landline numbers and ...

  3. Telephone - Wikipedia

    en.wikipedia.org/wiki/Telephone

    An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice ...

  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. Cellphone surveillance - Wikipedia

    en.wikipedia.org/wiki/Cellphone_surveillance

    Cellphone surveillance. Diagram showing the operation of a StingRay device for cellphone surveillance. Cellphone surveillance (also known as cellphone spying) may involve tracking, bugging, monitoring, eavesdropping, and recording conversations and text messages on mobile phones. [1] It also encompasses the monitoring of people's movements ...

  6. Phoneword - Wikipedia

    en.wikipedia.org/wiki/Phoneword

    Phoneword. Many telephone keypads have letters with the numbers, from which words can be formed. Phonewords are mnemonic phrases represented as alphanumeric equivalents of a telephone number. [1] In many countries, the digits on the telephone keypad also have letters assigned. By replacing the digits of a telephone number with the corresponding ...

  7. Phone cloning - Wikipedia

    en.wikipedia.org/wiki/Phone_cloning

    GSM cloning occurs by copying a secret key from the victim SIM card, [3] typically not requiring any internal data from the handset (the phone itself). GSM handsets do not have ESN or MIN, only an International Mobile Equipment Identity (IMEI) number. There are various methods used to obtain the IMEI. The most common method is to eavesdrop on a ...

  8. Nextel - Wikipedia

    en.wikipedia.org/wiki/NEXTEL

    Nextel. Nextel Communications, Inc. was an American wireless service operator that merged with and ceased to exist as a subsidiary of Sprint Corporation, which would later be bought by T-Mobile US and folded into that company. Nextel in Brazil, and formerly in Argentina, Chile, Peru, the Philippines, and Mexico, [3] is part of NII Holdings, a ...

  9. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code. The specific service access varies by country.

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