To add media files like audio and images to your SMS,
1. Go to SMS at the top of your page.
2. Click Media files on the left hand side of the page.
3. Click the Add media file button.
4. Write the name of the file and click the Upload file button to upload a media file from your computer
5. Click Save.
After adding the file, it will be reviewed and made available to you for messaging within 24 hours.
To send the file after it is reviewed and approved, select a file in the Add a file to message drop box beside the Message text box when sending SMS.