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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.
USSD gateway is based upon the ability of the delivery agent or the source to send and receive USSD messages. A USSD is a session-based protocol. A USSD is a session-based protocol. USSD messages travel over GSM signalling channels, and are used to query information and trigger services.
A card reader is a data input device that reads data from a card-shaped storage medium and provides the data to a computer. Card readers can acquire data from a card via a number of methods, including: optical scanning of printed text or barcodes or holes on punched cards, electrical signals from connections made or interrupted by a card's punched holes or embedded circuitry, or electronic ...
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These scanners are legal and can be bought in regular electronics stores. Most modern mobile telephones running Android OS have a built in NFC reader that can be used to unlawfully scan contactless payment cards. A criminal can hide the scanner e.g. inside a glove or a bag, and then place it close to the victim and wirelessly steal the victim's ...
A more general name for this class of Java Card-based applications running on UICC cards is the Card Application Toolkit (CAT). [ 2 ] [ 3 ] The SIM Application Toolkit consists of a set of commands programmed into the SIM which define how the SIM should interact directly with the outside world and initiates commands independently of the handset ...
The use of USSD increased by 14.5 per cent in March 2020, due to COVID-19 restrictions and in June same year, the value in monetary term was put at N390 billion and monthly average value of USSD transactions rose to N230 billion. Guaranty Trust Bank (GTB) alone reported ₦3.89 trillion in USSD transaction value for 2020. The USSD service ...
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