To send a ringtone message from the user interface you need to open the message composer by clicking on the compose button (Figure 1). In the message composer, you have to enable the message type option by clicking on the "View message type" menu item in the View menu.
Figure 1 - Enabling message types
Following this you can select the SMS:RINGTONE type and you can click on the example button. To send the message specify the recipient and click on Send! (Figure 2)
Figure 2 - Sending a Ringtone message.
To create the hexadecimal representation of the ringtone, you should read Appendix A4