Basics
Turning the device on and off
Press and hold the Power key for a few seconds to turn on the device.
When you turn on your device for the first time or after performing a data reset, follow the on- screen instructions to set up your device.
To turn off the device, press and hold the Power key, and then tap Power off.
•If your device is frozen and unresponsive, press and hold the Power key and the Volume Down key simultaneously for more than 7 seconds to restart it.
•Follow all posted warnings and directions from authorised personnel in areas where the use of wireless devices is restricted, such as aeroplanes and hospitals.
Emergency mode
You can switch the device to emergency mode to reduce battery consumption. Some apps and functions will be restricted. In emergency mode, you can make an emergency call, send your current location information to others, sound an emergency alarm, and more.
Activating emergency mode
To activate emergency mode, press and hold the Power key, and then tap Emergency mode.
The usage time left shows the time remaining before the battery power runs out. Usage time left may vary depending on your device settings and operating conditions.
Deactivating emergency mode
To deactivate emergency mode, tap 
→Disable Emergency mode. Alternatively, press and hold the Power key, and then tap Emergency mode.
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