Locking/Unlocking the Screen
Locking the phone turns the screen off and prevents unintended operations.
To lock the screen while using the phone, simply press the Power key. Also, if the
phone is not used for a specified period of time, the screen turns off and
automatically locks.
To unlock the screen, press the Power key to turn on the screen and slide the Padlock
icon up.
Note: Swipe up the screen in home screen, tap to enter the Settings screen. Then,
choose Security & location > Screen lock to set the type of lock screen.
Touch Screen
Tapping: To open an app, to select a menu item, to press an on-screen button, or to
enter a character using the keyboard on the screen, tap it with your finger.
Tapping and holding: Tap and hold an item on the screen for more than 400
milliseconds to access available options.