Method 3: Unlock OPPO Phone Password with Factory Reset. A factory reset is another option when it comes to how to unlock OPPO phone password, however, the bad thing about is that it will erase all the data you have stored on your device. So make sure to first transfer all your files to your PC by connecting your device right with your PC. Steps for OPPO hard reset without password using Dr. Fone-Screen Unlock (Android) Step 1. Launch the installed software on your system and from the main screen choose the Screen Unlock option. Step 2. Connect your phone to your PC using a USB cable and then select Unlock Android Screen option. Step 3. Connect your Oppo phone to the desktop using the USB cable. Tap the "Allow" option on the oppo mobile that will allow one to access the data on the device. Step 2: Find your Device on PC. The device will get automatically detected by the desktop. Or else you can click on the folder option and find your device from the "Devices and drives." Oppo A3s CPH1853 Unlock The Bootloader Quick 10 Steps. Firstly, you need to enable the Developer Options on your Oppo A3s CPH1853. Go to Settings->>About Phone->> and press the Build Number 6 to 7 times until you see a pop message that shows you "You are now a developer". Into the Developer Options, now you need to Enable USB Debugging, and Oppo A3S Clone Run on android 8.1 OS Which is Powered by Mediatek MT6572 Processor. it is a Dual SIM (GSM) Smartphone that accepts Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, USB OTG, FM, 3G. Unlocking Your Oppo A3 for Free Using the Unlock Code Generator The procedure for unlocking your Oppo A3 is not only free, but it is also the easiest one you'll find. You don't need any special, technical knowledge. Just about anyone can follow the simple steps for unlocking their Oppo device. All you have to do is enter your IMEI in the KytogW.