Sim tookit terminal attach #stta, Syntax, Parameters and values – Synaccess Networks NP-0801DTM User Manual
Page 288: Notes

SIM TOOLKIT COMMANDS
HSPA+ AT Commands Reference Guide
288
SIM Tookit Terminal Attach #STTA
This command attaches/detaches the SIM Toolkit application to the AT instance reserved for this use.
Read command reports the current
#STTA:
Test command reports the supported range of values for
Syntax
Command
Command type
AT#STTA=
AT#STTA?
Read
AT#STTA=?
Test
Parameters and Values
Attached state.
0
SIM Toolkit detaches.
1
SIM Toolkit attaches.
If SIM Toolkit application is already attached/detached the command does
nothing and returns OK.
Notes
The AT instance reserved for the SIM Toolkit application is the #3.
Issuing AT#STTA=
SMSATRUN/TCPATRUN) causes an ERROR result code to be returned.