Definition : Unstructured Supplementary Service Data
Category : Technology » Specifications & Standards
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What does USSD mean?

Unstructured Supplementary Service Data (USSD) is a protocol used by Global System for Mobile Communication (GSM) technology that is used to send text messages between a mobile phone and an application hosted by the mobile operator running on the network. The types of application may include balance check, mobile chatting, advertising etc. USSD is a session-based protocol, it establishes a real time session between mobile handset and application handling the service.

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United States USSD United Studios of Self Defense
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