The left side holds the SIM tray, while the right side holds a textured metal power button, with a smooth metal volume rocker placed just above it. (androidheadlines.com)
The Idol 4S features metal volume control (right side) and power buttons (upper left). (windowscentral.com)
The lightly tapered edges house metal volume buttons and a rotation - lock / mute switch on one side, a power / sleep button and 3.5 mm audio jack on top, and the Lighting port and speakers on the bottom edge. (mashable.com)