Getting started17Locking and unlocking the deviceWhen not in use, lock the device to prevent unwanted operation. Pressing the Power buttonturns off the screen and puts the device into lock mode. The device automatically gets lockedif it is not used for a specified period.To unlock the device, press the Power button or the Home button when the touch screen isturned off, tap anywhere on the screen, and then flick your finger in any direction.Adjusting the volumePress the Volume button up or down to adjust the ringtone volume, or to adjust the soundvolume when playing music or video.Switching to silent modeUse one of the following methods:• Press and hold the Volume button down until it switches to silent mode.• Open the notifications panel at the top of the screen, and then tap Sound or Vibrate.