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  2. Supplementary service codes - Wikipedia

    en.wikipedia.org/wiki/Supplementary_service_codes

    ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.

  3. Unstructured Supplementary Service Data - Wikipedia

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

    USSD on a Sony Ericsson mobile phone (2005). Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.

  4. Mobile network codes in ITU region 3xx (North America)

    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 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.

  5. GSM services - Wikipedia

    en.wikipedia.org/wiki/GSM_services

    See also GSM codes for supplementary services. Call forwarding. Barring of Outgoing Calls. Barring of Incoming Calls. Advice of Charge (AoC). This GSM service estimates the call cost for display on the user's mobile phone. [1] This helps users by preventing bill shock [2] and reduces the load on the mobile network operator's customer service ...

  6. Category:Mobile telecommunications standards - Wikipedia

    en.wikipedia.org/wiki/Category:Mobile...

    Samsung SGH-A657 (AT&T) Scanet; SCKL; Selectable Mode Vocoder; SIM Application Toolkit; SIP extensions for the IP Multimedia Subsystem; SMS; Software Communications Architecture; Software Component Management Object; Supplementary service codes

  7. GSM 03.38 - Wikipedia

    en.wikipedia.org/wiki/GSM_03.38

    In mobile telephony GSM 03.38 or 3GPP 23.038 is a character encoding used in GSM networks for SMS (Short Message Service), CB (Cell Broadcast) and USSD (Unstructured Supplementary Service Data).

  8. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    GSM USSD codes – Unstructured Supplementary Service Data: list of all standard GSM codes for network and SIM related functions; Handoff; High-Speed Downlink Packet Access (HSDPA) International Mobile Equipment Identity (IMEI) International Mobile Subscriber Identity (IMSI) Long Term Evolution (LTE) MSISDN Mobile Subscriber ISDN Number

  9. Mobile dial code - Wikipedia

    en.wikipedia.org/wiki/Mobile_dial_code

    USSD (Unstructured Supplementary Service Data) codes [1] are mobile dial codes that can be used for communicating with the service provider's computers (i.e. for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network).