Defines operations and properties of a single SMS message. Deletes the message. If the message has not yet been sent, queue it for delivery. Describes the state of the message. Indicates the number to which the message is addressed. Message text. When sending, if the text is larger than the limit of the technology or modem, the message will be broken into multiple parts or messages. Indicates the SMS service center number. Always empty for 3GPP2/CDMA. Specifies when the SMS expires in the SMSC. Always 0 for 3GPP2/CDMA. 3GPP message class (0..3). Always 0 for 3GPP2/CDMA. Time message was received or was sent in ISO8601 format. State unknown or not reportable. The message has been neither received nor yet sent. The message is being received but is not yet complete. The message received and is complete. The message is queued for delivery. The message was successfully sent.