How to set the ringtone of Samsung W999?

1. Open the music icon on the desktop, as shown.

2. Enter the interface and click the song, as shown in the figure.

3. Enter the interface and click to open the song, as shown in the figure.

4.？ The song is playing, as shown in the picture.

5. Click the "Menu" button to pop up the dialog box, and select "Use ringtone" to set the ringtone, as shown in the figure.