When the screen is off, simply double-tap the fingerprint sensor button to effortlessly brighten up the display.
Quickly unlock the OPPO F3 Lite (A57) screen with a double tap on the fingerprint sensor by following these steps:
Step 1: Navigate to 'Settings' and select 'Gestures and Motions.'

Select 'Gestures and Motions.'
Step 2: Choose 'Gestures when the screen is off.'

Choose 'Gestures when the screen is off.'
Step 3: Enable 'Double-tap fingerprint to wake up the screen.'

Enable 'Double-tap fingerprint to wake up the screen.'
Congratulations! You have successfully activated the double-tap fingerprint feature to brighten up the screen on the OPPO F3 Lite (A57).