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