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  2. Plus (Polish telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Plus_(Polish...

    www.plus.pl. Plus (formerly Plus GSM) is the brand name of Poland 's mobile phone network operator, Polkomtel Sp. z o.o. The company is entirely owned by Cyfrowy Polsat S.A. and is part of Grupa Polsat Plus. It operates GSM (900/1800 MHz), UMTS, LTE, 5G NR (2600 MHz TDD) and WLAN networks in Poland. It was founded in 1995.

  3. List of mobile network operators in Europe - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_network...

    Sweden has 14.3 million subscribers in total, approximately 140% penetration rate (2020). [129] The country's telcom regulator is Swedish Post and Telecom Authority . There are four main network operators, and they share various 2G , 3G , 4G and 5G network infrastructure through co-ownership in separate network companies.

  4. List of international call prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_international_call...

    This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, only the symbol + before the country code may be used [citation needed] irrespective of where the telephone is used at that moment; the ...

  5. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    Voice over Internet Protocol (VoIP), [a] also called IP telephony, is a method and group of technologies for voice calls for the delivery of voice communication sessions over Internet Protocol (IP) networks, [2] such as the Internet. The broader terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the ...

  6. Digi Communications - Wikipedia

    en.wikipedia.org/wiki/Digi_Communications

    Digi Communications N.V., also known as DIGI Group, is a Romanian telecommunications holding company, which also has businesses in Spain, Italy, Portugal and Belgium. The firm has current statutory seat in the Netherlands and headquarters of effective management in Romania. Digi was founded by Zoltán Teszári, who is the majority shareholder ...

  7. Telephony - Wikipedia

    en.wikipedia.org/wiki/Telephony

    Telephony (/ təˈlɛfəni / tə-LEF-ə-nee) is the field of technology involving the development, application, and deployment of telecommunications services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone.

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