Samsung Galaxy S8 - Manual (Page 17)

Set Up Your Device 10
Start Using Your Device
Turn Your Device On or Off
The instructions below explain how to turn your device
on or off.
To turn the device on:
► Press and hold the Power key until the device
turns on.
To turn the device off:
1. Press and hold the Power key until the
Device options menu is displayed.
2. Tap Power off, and confirm if prompted.
Lock or Unlock Your Device
Use your device’s screen lock features to secure your
device. By default, the device locks automatically when
the screen times out.
To lock the device:
► Press the Power key.
The default Screen lock on your device is Swipe.
To choose a more secure screen lock, see “Set a Screen
Lock” on page 175.
To unlock the device:
► Press the Power key or double‑tap Home, and
then drag your finger across the screen.