> 2.18 | SIM Application Toolkit (SAT)

> SAT allows the flexibility to update the SIM to alter services and download new services over the air. It defines a set of fairly simply operations to extend the functionality of a SIM card. SAT establishes the link between the SIM application running on the SIM card and the customer application (e.g., PDA, laptop etc.). The SIM cards store user specific data (e.g. phonebook etc.), but they can also provide a lot of value added mobile application. Typical examples are online banking, news, weather or other information services.