How are USSD codes developed? What programming language is used to create USSD codes?

Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular ... A predefined session is started once a user dials into a code e.g. *123# facilitating the transfer of information between the USSD application and the mobile ... Mar 10, 2018 ... I'd be surprised if it was possible to answer to ussd messages. ussd is a separate protocol (gsm ts 03.90 I believe), and unless the gateway ... Jan 7, 2021 ... I think you can do the following if you want to press 1 call("*101*1#") but every cellular company has it's own rules and regulations regarding the ussd. I was developing an app which make ussd call but when i put the number as *804# app inventor didn't recognize this # signso please help me Mar 16, 2023 ... USSD is a set of unique codes which are considered as communications protocol. The set of unique codes are used by your GSM telephone operators. This article unveils the complete list of these codes, offering users a streamlined experience for managing their finances on the go. This platform aims at promoting a comprehensive multi-channel transaction and payment switching platform that leverages electronic communication and ... I just upgraded from m7350 to M7450. With same operator I was able to run ussd codes with m7350 but m7450 just returns the value to 0. What are USSD codes? · Airtel Mobile · International Bundles · SmartSPEEDOO Data Plans · Triple Surf Offer · To enjoy the Triple Surf offer simply dial *141# ...