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  2. Public safety answering point - Wikipedia

    en.wikipedia.org/wiki/Public_safety_answering_point

    A public-safety answering point ( PSAP ), sometimes called a public-safety access point, is a type of call center where the public's telephone calls for first responders (such as police, fire department, or emergency medical services / ambulance) are received and handled. It takes calls from any landline, mobile phone line, or VoIP (Voice over ...

  3. Instant messaging - Wikipedia

    en.wikipedia.org/wiki/Instant_messaging

    SMS was a much more dominant form of communication before smartphones became widely used globally. While SMS relied on traditional paid telephone services, instant messaging apps on mobiles were available for free or a minor data charge. In 2012 SMS volume peaked, and in 2013 chat apps surpassed SMS in global message volume.

  4. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    2G also introduced the ability to access media content on mobile phones. In 1998, the first downloadable content sold to mobile phones was the ring tone, launched by Finland's Radiolinja (now Elisa). Advertising on the mobile phone first appeared in Finland when a free daily SMS news headline service was launched in 2000, sponsored by advertising.

  5. Telephone numbers in Romania - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Romania

    Free phone numbers start with 800 (like 0-800-xxx-xxx). Strangely, some companies to whom a numbering class is allocated may not grant toll-free access to those numbers for other networks. Therefore, sometimes a "toll-free" number is advertised as "toll free only within some operator". Some 08pp prefixes are used for various services, like:

  6. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the three major cellular carriers in the country, AT&T Mobility, T-Mobile US, and Verizon. [1] [2] In 2016, MVNOs across the nation such as Metro PCS, Boost Mobile, Cricket Wireless, and Tracfone brands served about 36 million subscribers.

  7. Telephone numbers in Slovakia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Slovakia

    Telephone numbers in Slovakia. This page details the format and usage of telephone numbers in Slovakia. Today, Slovakia uses a closed numbering plan with area codes beginning with 0. After 0, there is usually a 2-digit prefix, followed by a 7-digit subscriber number. The capital, Bratislava, has one-digit prefix and an 8-digit subscriber number ...

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