Oppo A3S hard reset / Oppo A3S factory data reset procedure: Switch off your Oppo A3s. Now long press power button and volume down button together for about 1-3 seconds. After releasing the buttons, you will see the on screen instructions. First select language for instructions. Now choose wipe data and again choose wipe all data and click ok button. Wait for few minutes. Your phone will get done hard reset or factory data reset. Then select reboot option and your phone will be starting as a new phone. You can now enjoy using your Oppo A3s smartphone as a fresh look up. Thanks for watching... Subscribe for more videos... Until then good bye!!!