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  2. SIM Application Toolkit - Wikipedia

    en.wikipedia.org/wiki/SIM_Application_Toolkit

    SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...

  3. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.

  4. Telkom Mobile - Wikipedia

    en.wikipedia.org/wiki/Telkom_Mobile

    Telkom (formerly known as 8.ta from 18 October 2010 till 19 March 2013 and as Telkom Mobile From 19 March 2013 till 2014), [1] [2] [3] is a South African mobile telecommunications company. Telkom was launched in October 2010 and is owned by Telkom SOC .

  5. Telkomsel - Wikipedia

    en.wikipedia.org/wiki/Telkomsel

    It is headquartered alongside Telkom in the Telkom Landmark Complex. Telkomsel is the largest cellular telecommunication carrier in the country with 169.5 million customer base as of 2020. [ 2 ] The company operates their GSM network on the 900–1800 MHz frequency range, as well as 3G , 4G , and 5G services on other frequencies.

  6. Mobile network codes in ITU region 6xx (Africa) - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 600 and 699, inclusively – a region that covers Africa and the surrounding islands (excluding the Canary Islands and Madeira, which are part of Spain and Portugal, respectively).

  7. Local number portability - Wikipedia

    en.wikipedia.org/wiki/Local_number_portability

    Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to another location ("geographic portability"), or ...

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