View source for USIM Application Toolkit

:''Not to be confused with'' USAT (United States Army Transport)
'''USIM Application Toolkit''' (USAT) is the equivalent of [[SIM Application Toolkit|STK]] for [[3G|3G]] networks.<ref name=autogenerated1>http://www.gemalto.com/techno/stk/</ref> USAT enables the USIM to initiate actions which can be used for various value-added services delivered over mobile devices.

USAT takes advantage of the multiapplication environment of 3G devices by not activating until a specific application has been selected, unlike STK which is activated at startup.<ref>[http://www.ec-mobile.ust.hk/mobile/toolkit.htm Mobile SIM Tool Kit<!-- Bot generated title -->]</ref> Some functions are card related rather than application related.<ref>http://www.3gpp.org/ftp/tsg_t/WG3_USIM/TSGT3_10/docs/t3-99346.doc</ref>

USAT is defined in standard [[Organization:3GPP|3GPP]] 31.111 for 3G.<ref name=autogenerated1 />

==More information==
For more information see [[SIM Application Toolkit|STK]], the equivalent of SAT for [[2G|2G]].

==References==
<references/>

{{DEFAULTSORT:Usim Application Toolkit}}
[[Category:Mobile telecommunications standards]]
[[Category:3GPP standards]]

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