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  2. Airalo - Wikipedia

    en.wikipedia.org/wiki/Airalo

    In 2019, Airalo secured $1.9 million in seed funding from Antler and Sequoia Capital. [12]In October 2021, it secured $5 million in Series A financing. [12] [13]In July 2023, it received $60 million in a Series B financing round led by e& Capital, the venture arm of e&, with participation from Antler Elevate, Liberty Global, Rakuten Capital, Singtel Innov8, Surge, Orange, T Capital (the ...

  3. GSM frequency bands - Wikipedia

    en.wikipedia.org/wiki/GSM_frequency_bands

    GSM-1900 and GSM-850 are used in most of North, South and Central America (ITU-Region 2). In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 MHz.

  4. GPRS core network - Wikipedia

    en.wikipedia.org/wiki/GPRS_core_network

    GPRS Tunnelling Protocol is the defining IP-based protocol of the GPRS core network. Primarily it is the protocol which allows end users of a GSM or WCDMA network to move from place to place while continuing to connect to the Internet as if from one location at the Gateway GPRS support node (GGSN).

  5. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    Thomas Haug (first GSM president) and Philippe Dupuis (second GSM president) during a GSM meeting in Belgium, April 1992. In 1983, work began to develop a European standard for digital cellular voice telecommunications when the European Conference of Postal and Telecommunications Administrations (CEPT) set up the Groupe Spécial Mobile (GSM) committee and later provided a permanent technical ...

  6. GSM services - Wikipedia

    en.wikipedia.org/wiki/GSM_services

    In order to gain access to GSM services, a user needs three things: A billing relationship with a mobile phone operator.This is usually either where services are paid for in advance of them being consumed (), or where bills are issued and settled after the service has been consumed ().

  7. GSM procedures - Wikipedia

    en.wikipedia.org/wiki/GSM_procedures

    GSM procedures are sets of steps performed by the GSM network and devices on it in order for the network to function.GSM (Global System for Mobile Communications) is a set of standards for cell phone networks established by the European Telecommunications Standards Institute and first used in 1991.

  8. GSM modem - Wikipedia

    en.wikipedia.org/wiki/GSM_modem

    A GSM module is a device that allows electronic devices to communicate with each other over the GSM network. GSM is a standard for digital cellular communications, which means that it provides a platform for mobile devices to communicate with each other wirelessly.

  9. Circuit Switched Data - Wikipedia

    en.wikipedia.org/wiki/Circuit_Switched_Data

    In communications, Circuit Switched Data (CSD) (also named GSM data) is the original form of data transmission developed for the time-division multiple access (TDMA)-based mobile phone systems like Global System for Mobile Communications (GSM).