Command	Definition
AT+CSCA	Set the SMS center address. Mobile originated messages are transmitted through this service center.
AT+CMGS	Send short message to the SMS center
AT+CMGR	Read one message from the SIM card storage
AT+CMGD	Delete a message from the SIM card storage
AT+CMGF	Select format for incoming and outgoing messages: zero for PDU mode; one for Text mode
AT+CSMP	Set additional parameters for Text mode messages
Table 3—To send SMS messages, you can use these (mainly) AT commands. For more details, you may want to read the GSM 07.07 protocol on the ETSI web site.