Hisense U40 - Functions of Keys; Functions of icons

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2.2 Functions of Keys
The mobile phone provides the following keys:
 Power key
Power key situates at the right side of the phone. While using the phone, you can press this key to lock
screen; if you press and hold this key, a phone-options dialog would pop out. Here, you can choose to power
off, restart and Screenshot. Long press the Power key for more then 14s to restart.
 Volume key
Volume key situates at the upper side of the power key. You can press it to adjust ring volume.
2.3 Functions of icons
 Home icon
Touch this icon to return to the main interface.