Use Volume Button Extender for Easy Music Control on Your iPhone [Jailbreak Superguide]
If you haven’t upgraded to iOS4, VolumeButtonExtender available on Cydia is worth checking out. While the iPhone offers a couple of ways to control your music, you need use the screen to do it, not a great solution if you’re jogging, using it in the car or otherwise need to turn adjust the volume or [...]
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