Samsung Galaxy S III User Manual page 370

Using Swipe
This feature is the least secure locking method and only requires
that a user swipe the screen to unlock the device.
1. From the main Settings page, tap Lock screen.
2. Tap Screen lock
Using a Motion to Unlock
This feature allows you to lock or unlock your device by simply tilting
it and moving it either forwards or backwards.
1. From the main Settings page, tap Lock screen.
2. Tap Screen lock
To unlock a device with motion:
1. Verify the device is on and on the Lock screen.
2. In a single motion, use your thumb to touch and hold the Lock
screen, then quickly tilt the device towards you.
Note: If you forget, these instructions appear at the bottom of the Lock
screen.
362
Swipe.
Motion OK.