If you want to use this tool:
echo -e "AT+CFUN=?\r\n" > /dev/smd11
AT+CFUN=?
+CFUN: (0-1,4-7),(0-1)
OK
More AT commands
Get modem status: at+cfun?
Set modem online: at+cfun=1
Get CS registration: AT+CREG?
Get PS registration: AT+CGREG?
PS attach or detach: AT+CGATT
Dial: ATD09xxxxxxxx;
Send SMS:
AT+CMGF=1
AT+CMGS=”09xxxxxxxx”
Get APN: at+cgdcont?
Add APN: at+cgdcont=1,"IP","INTERNET"
PDP status: AT+CGACT?
Activate/deactive PDP: AT+CGACT=1,1
Get IccID: at+crsm=176,12258,0,0,10
Check Pin: AT+CPIN?
Input PIN: AT+CPIN="****"
Network Selection: at+cops?