It is a set of purposes residing on the Subscriber Identification Module (SIM) card that interacts with the cellular gadget’s working system. Performance contains companies similar to stability inquiries, cellular banking, data companies, and community configuration. For example, a consumer would possibly entry a menu inside the cellphone’s interface to test their pay as you go stability by way of the SIM, initiating a request despatched to the community operator.
Its significance lies in enabling cellular community operators to supply value-added companies on to subscribers, impartial of the handset producer or working system. This offers a constant consumer expertise throughout a variety of units. In earlier cellular communication eras, it was an important channel for delivering important companies and differentiating choices in aggressive markets.