If you look at the images, you can see that volume rocker and power button on the right side of the smartphone. (phoneradar.com)
Moving ahead on talk of ports and buttons, you get volume rocker keys and power button on the right edge of the device, left edge is kept empty. (phoneradar.com)
There is a small power button on the right hand corner of the unit, on a small curved part of the bezel. (goodereader.com)