It’s not very clear how to rewind or fast forward a song on your iPhone 3G. The feature is so hard to find that some users think there is no way to do it. You can though, and here’s how:

1. While the song is playing, the album art will appear. If there is no album art, a music note appears instead. Tap the album art/note.

2. Now you will see a bunch of features you may not be aware of. One of them is the line that indicates where on the music track your song is playing. You can now drag the ball back and forth to fast forward or rewind.