If you are locked out of the screen, you can perform a Hard Reset by holding Volume Down + Power .
If compatible, this may bypass the setup and jump directly to the home screen.
Press and hold Volume Down + Power buttons simultaneously until the Oppo logo appears, then release. Wipe Data:
If you are tech-savvy, attempt Method 1 first. If you are a standard user or the phone has a patched firmware version, using a professional unlock service or PC software ( Method 2 ) is the most efficient path.