It’s a commonplace set of instructions permitting the Subscriber Identification Module (SIM) to provoke actions on a cell phone. Performance can embody menu creation, sending SMS messages, and initiating cellphone calls. A person would possibly work together with it by means of a SIM menu, for instance, to entry cell banking companies or to verify their pay as you go steadiness immediately with out dialing a selected code.
This know-how enhances the performance of the SIM card, enabling cell community operators to supply value-added companies on to subscribers. Its utility resides in enabling safe and handy entry to companies immediately from the SIM, typically in environments the place information connectivity is proscribed or unavailable. Traditionally, it supplied an important methodology for deploying interactive companies on function telephones and continues to play a job in rising markets with restricted smartphone penetration.