Currently Being ModeratedJul 8, 2013 2:41 PM (in response to DLine_Swagger)
The earbud controls do change the volume (the top and bottom butons of the control). To activate Siri, press and hold the center control. And use Siri to make a phone call ("Call John Doe" for example). This of course assumes siri is available in your country, and is turned on on the iPhone.