Sony Xperia E4

Select one of the following options:

Turn screen lock on or off, go to 1a.

Select time for automatic screen lock, go to 1b.

To turn on the screen lock:

Briefly press On/Off.

To turn off the screen lock:

Briefly press On/Off.

Slide you finger up or down on the display.

Slide two fingers down the display starting from the top edge of your phone.

Press Settings.

Press Display.

Press Sleep.

Press the required period.

Press the home icon to return to the home screen.