One of the great design decisions which Apple took in respect to the iPhone, iPod touch and iPad is the almost-flawless form factor and external body of the device that has only been disrupted with the addition of hardware buttons where absolutely necessary. There is a good reason why the original iPhone only had two volume buttons, a silent switch, a home button and a sleep button, and that design trend continues to this very day. However, some users like to have a way to use the volume buttons on the device to invoke different actions, which is why the BrightVol Cydia tweak may be of interest to some users.