What Does SIM Toolkit (STK) Mean?
The SIM Toolkit (STK) is a set of commands or applications that define how a SIM card interacts with the outside world. The toolkit, which is usually programmed into the SIM card, enables the card to:
Techopedia Explains SIM Toolkit (STK)
The SIM Toolkit is a standard of the GSM system and consists of a set of commands that can be activated by user actions or network events. The proactive commands are standard for all mobile equipment and defined by ETSI and 3GPP specifications. The standards allow additional value-added services and functionality to be integrated onto the SIM card to provide customized user interface and menus on the mobile handset.
