iPhone Life magazine

Double-tap the Home button to open the Phone/music playback control

Double-tapping the Home button on the iPhone (from within any application) will open the Phone application. On the iPod touch, it will open a pop-up control for music playback. When the iPhone and iPod touch are locked, double-tapping the Home button will bring up the music playback control; double-tapping it a second time will close the control.