Description: USSD, which stands for Unstructured Supplementary Service Data, is a communication protocol primarily used in mobile networks for transmitting data between mobile phones and service provider computers. Unlike SMS text messages, which are stored and sent asynchronously, USSD allows for real-time communication, meaning interactions are instantaneous and occur within a single connection session. This protocol operates on the control channel of GSM networks, enabling faster and more efficient data transmission. USSD is widely used for services such as balance inquiries, credit top-ups, access to mobile banking services, and other interactive applications. Its simplicity and speed make it a valuable tool for mobile phone users, especially in areas where internet access may be limited or costly.
History: The USSD protocol was developed in the 1990s as part of the evolution of GSM networks. Its implementation was carried out to enhance communication between users and service providers, allowing for faster and more efficient interactions. As mobile technology advanced, USSD became an essential tool for offering interactive services, especially in emerging markets where internet access was not as common. Over the years, its use has expanded, integrating into various mobile applications and services.
Uses: USSD is primarily used for real-time inquiry and transaction services. This includes checking balances on mobile accounts, topping up credit, activating additional services, and accessing mobile banking services. It is also employed in interactive surveys and providing instant information to users. Its ability to function without the need for an internet connection makes it especially useful in regions with limited network infrastructure.
Examples: A practical example of USSD is the balance inquiry service offered by many mobile operators. Users can dial a specific code, such as *123#, and instantly receive information about their available balance. Another example is the use of USSD in mobile banking services, where customers can make money transfers or pay bills simply by dialing a USSD code and following on-screen instructions.
