HTC One (M8)

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:

Press anywhere on the display twice in quick succession.

Slide your finger up the display.

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

Press SETTINGS.

Press Display & gestures.

Press Screen timeout.

Press the required period.

Press the home icon to return to the home screen.