It is a set of purposes residing on the Subscriber Id Module (SIM) card that interacts with the cell system’s working system. Performance contains companies similar to steadiness inquiries, cell banking, info companies, and community configuration. For example, a consumer may entry a menu inside the telephone’s interface to verify their pay as you go steadiness via the SIM, initiating a request despatched to the community operator.
Its significance lies in enabling cell community operators to offer value-added companies on to subscribers, unbiased of the handset producer or working system. This supplies a constant consumer expertise throughout a variety of units. In earlier cell communication eras, it was a vital channel for delivering important companies and differentiating choices in aggressive markets.
