Useful apps and features
Video
Playing videos
Tap Video on the Apps screen.
Select a video to play.
Change screen ratio.
Move forwards or backwards by dragging the bar.
Skip to the previous video. Tap and hold to move backwards quickly.
Adjust the volume.
Access additional options.
Pause and resume playback.
Rotate the screen's orientation.
Skip to the next video. Tap and hold to move forwards quickly.
Calculator
Use this app for simple or complex calculations. Tap Calculator on the Apps screen.
Rotate the device to landscape orientation to display the scientific calculator. If Screen rotation is disabled, tap 
→Scientific calculator.
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