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What is SIM Application Toolkit technology?

The SIM Application Toolkit or STK, in short, is a set of commands which define how the card should interact with the outside world and extends communication protocol to the card and the handset.


SIM Tool Kit


When using the SIM Application Toolkit, the card has a proactive role with the handset.


In other words, it's the SIM that initiates commands independently of the handset and the network.

In 2G networks, the SIM Application Toolkit (SAT) is defined by the GSM 11.14 standard.

After the release of 4G, GSM 11.14 will be replaced by 3GPP 31.111, which also includes the specifications for USIM Application Toolkit (USAT) for 3G networks.

Power to the SIM card!

Create value-added services thanks to SIM Toolkit technology and Gemalto's SAT.


Where do we fit in?

Gemalto's SIM Application Toolkit (SAT) has been the primary Value Added Service (VAS) technology over recent years.

Through Gemalto's experience in real-life implementations; we have a clear vision of the services being deployed, the security considerations, new marketing tactics, design methodologies and the need for partnerships with banks or information providers.

SAT technology has proven its importance in reducing the churn rate through value-added services.

Users know to expect more from their mobile phones, and SAT is delivering secure, flexible, user-friendly value-added services to existing networks and handsets.

SAT will continue to be a powerful VAS technology for mobile services over the years to come.