A typical SAT/USAT session, running on AT interface, starts when the user receives
the #STN: 37 URC. The unsolicited result code must be previously enabled by the
#STIA command. The #STN: 37 notifies the user that the main menu of the
SIM/USIM Application has been sent to TA, and TA has stored the just received
menu. Later, at any time, you can type in the AT#STGI=37 command to display the
main menu of the SIM/USIM Application on TE.
Upon receiving the #STGI response, you must enter the #STSR command to
confirm the execution of the proactive command and provide any required user
response. In this case, you must enter the AT#STSR=37,0,x command to select the
x item of the SIM/USIM Application menu.
The #STN: 237 URC indicates that the main menu of the SIM/USIM Application has
been removed from TA, and it is no longer available. In this case, AT#STGI=37
command returns ERROR message.
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