If you want to add volume buttons on your iPhone on the Springboard then you should have the option of 'SBvolume'. It is a small utility that enables you to include volume controls on SpringBoard. When you install SpringBoard, it will add volume icons on your SpringBoard.It is used for increase and decrease the volume on your iDevice.
SBvolume is useful in some ways when you want to adjust volume on your iDevices instantly. When physical volume buttons on your iDevice facing problem then it will be benificial for you to resolve it. It adds two volume buttons on your home screen right above the dock. If you want to get SBvolume just open Cydia and look up for 'SBvolume' and install the app.
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