From the lock screen, you can:
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Make an emergency call.
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View and respond to notifications. Double touch one to open it.
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Open quick settings. Swipe down from top of the screen for your four top settings and notifications, 
then swipe again to see the rest.
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Start a voice command. Swipe up diagonally from either bottom corner.
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Go into Lockdown. Temporarily turn off notifications and fingerprint unlocking.
You can customize your lock screen to add a message and control what content and features appear.
Learn the basics 13