USSD
USSD is the acronym for Unstructured Supplementary Service Data.
Unstructured Supplementary Service Data
A communications protocol that’s used by mobile phones to communicate with the mobile network operator’s computers. With USSD, mobile users interact directly by making selections from menus. Unlike an SMS message, a USSD message creates a real-time connection with each session, enabling two-way communication of information.
- Abbreviation: USSD