As an alternative to static SIM toolkit applications with a fixed pre-installed menu, some operators opt for dynamic SIM toolkit, where the menus and user dialogs are generated on the fly based on information provided by a central server. SIM applications that provide this functionality are generally referred to as SIM browers or µ-browsers.

The Wireless Internet Browser (WIB) specified by SmartTrust was the first succesful such µ-browser. The SIM Alliance has on their side defined an alternative browser named the S@T browser. The S@T specifications are open and therefore allow the operator a choice of supplier for both the S@T gateway and S@T enabled cards. Logos offers a SIM OS with an integrated S@T browser as well as a cost efficient S@T gateway.

To allow third-party development of SIM toolkit applications, Logos offers the LSCript products that include a highly efficient proprietary interpreter on the card.

The Wireless Internet Browser (WIB) is specified by SmartTrust and is the market leading solution for SIM toolkit based browsing. The Logos SIM WIB solution uses encrypted short messages to communicate with

Logos SIM is based upon a highly efficient, 100% in-house developed Java Card Virtual Machine. The Java powered Logos SIM combines the VM with the successful native Logos SIM. The result is a