SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services.[1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being an example. A more general name for this class of Java Card-based applications running on UICC cards is the Card Application Toolkit (CAT).[2][3]
The SIM Application Toolkit consists of a set of commands programmed into the SIM which define how the SIM should interact directly with the outside world and initiates commands independently of the handset and the network.[4] This enables the SIM to build up an interactive exchange between a network application and the end user and access, or control access to, the network.[1] The SIM also gives commands to the handset such as displaying menus and/or asking for user input.[5]
STK has been deployed by many mobile operators around the world for many applications, often where a menu-based approach is required, such as Mobile Banking and content browsing.[1] Designed as a single application environment, the STK can be started during the initial power up of the SIM card[5] and is especially suited to low level applications with simple user interfaces.[6]
In GSM networks, the SIM Application Toolkit is defined by the GSM 11.14 standard released in 2001.[1][4][6] From release 4 onwards, GSM 11.14 was replaced by 3GPP TS 31.111 which also includes the specifications of the USIM Application Toolkit for 3/4G networks.[2]
^ abcd"SIM Toolkit". Cellular. Archived from the original on 2006-12-07. Retrieved 2006-11-21.
SIMApplicationToolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be...
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07 – Cellphone features GSM 03.48 – Security mechanisms for the SIMapplicationtoolkit Intelligent Network Parlay X RRLP – Radio Resource Location Protocol...
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"Invism Software Applications". Invism. 2010-03-11. Retrieved 2010-12-05. Lane, Rick (July 7, 2016). "History of the best immersive sims". PC Gamer. Archived...
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