well i landed here.. no answers yet if that would be of an help for future googlers
http://www.developershome.com/sms/howToSendSMSFromPC.asp is a great reference.
AT
OK
AT+CMGF=1
OK
AT+CMGW="+21291234567"
> A simple demo of SMS text messaging.
+CMGW: 1
OK
AT+CMSS=1
+CMSS: 20
OK
tested on samsung s3...