Back before volume buttons came standard on cellphones, the best way of dealing with ambient noise was by either hushing it with a dramatic arm-waving, or dodging it with a fighter jet. Break the sound barrier today with our iPhone 3G and 3GS volume button.
This button is the external rocker switch used to adjust volume levels. This button interfaces with buttons on the iPhone's headphone jack.
Identify your iPhone
All 3G and 3GS iPhones