Multi-Tech Systems CDMA Wireless Modem - Manual (Page 113)

Chapter 15 – SIM TOOLKIT
Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 113
On the first step the customer application informs the modem which facilities are supported. This
operation is performed with the +STSF (SIM ToolKit Set Facilities) command, which is also used to
activate or deactivate the SIM Toolkit functionality. On the second step, an unsolicited result +STIN (SIM
ToolKit indication) is sent by the product to indicate the customer application which command type the
SIM Application Toolkit is running on the SIM card. The last SIM Toolkit indication can be requested by
the +STIN? command. On the third step, the customer application uses the +STGI (SIM ToolKit Get
Information) command to get all the information about the SIM ToolKit command, given by +STIN. On
the fourth step, the customer application uses the +STGR (SIM Toolkit Give Response) to send its
response (if any) to the SIM ToolKit Application.
The +STCR (SIM Toolkit Control response) indication is an unsolicited result sent by the SIM when Call
control functionality is activated and before the customer application has performed any outgoing call,
SMS, SS, or USSD.