Dell Mini 3v - Manual (Page 56)

3 To browse all audio files on the phone including the SIM card and the microSD card, press the Options button and then tap Scan.
4 Double-tap any song to start playing the song.
To create a playlist:：
1 From the Tracks screen, select a category.
2 From the list that appears, navigate to the artist, album, or song that you want on a playlist.
3 Tap and hold the artist, album, or song to open the pop-up menu. Tap Add to playlist.
NOTE: You can also use this menu to Play, change Properties, Share, or Delete the songs.
4 In the Add to playlist menu that opens, select My favorites or any other playlist you created.