SIM application toolkit

The SIM Application Toolkit (SAT) is a set of programs stored on your mobile SIM card that allows your network provider to offer additional services beyond basic calling and texting. These programs can guide you through menu options, provide information, or facilitate transactions directly from your phone, even without needing a separate app. Essentially, SAT enables network operators to customize and enhance your mobile experience, ensuring smooth interactions like checking account balances or receiving special alerts, all managed securely through the SIM card.