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  2. International call - Wikipedia

    en.wikipedia.org/wiki/International_call

    It can be made through a call-forwarding service that allows mobile phone users to associate an international phone number with a landline number within the United Kingdom. Users would dial a landline number and the call is then forwarded internationally. This allows mobile phone users to take advantage of their free minutes when accessing the ...

  3. History of the telephone in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_the_telephone...

    By mid-century, mobile radio telephone service became available to free users from fixed locations in some cities. The arrival of the smartphone in the early 21st century provided every user a small mobile computer with microphone and speaker, that was bundled with powerful features, such as cameras and Internet access by operation of apps .

  4. Telephone numbers in Colombia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_colombia

    Mobile service. As with landlines, calls from mobile phones to both landline and mobile numbers are placed by dialing the 10-digit subscriber number with no prefix. Mobile subscriber numbers follow the pattern: 3MM-XXX-XXXX; where 3MM usually indicates the one of the country's mobile phone operators.

  5. Plain old telephone service - Wikipedia

    en.wikipedia.org/wiki/Plain_old_telephone_service

    Plain old telephone service. Plain Old Telephone Service ( POTS ), or Plain Ordinary Telephone System, [1] is a retronym for voice-grade telephone service employing analog signal transmission over copper loops. Originally POTS stood for Post Office Telephone Service as early phone lines in most parts of the world were operated directly by the ...

  6. Caller ID spoofing - Wikipedia

    en.wikipedia.org/wiki/Caller_ID_spoofing

    Caller ID spoofing. Caller ID spoofing is a spoofing attack which causes the telephone network's Caller ID to indicate to the receiver of a call that the originator of the call is a station other than the true originating station. This can lead to a display showing a phone number different from that of the telephone from which the call was placed.

  7. 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 ...

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