Oppo A57 2016 Firmware -

Release the keys once your PC plays a hardware connection sound. Open Windows to verify it is listed under Ports as Qualcomm HS-USB QDLoader 9008 . Step 3: Trigger the Firmware Flash

If your firmware is an .ofp file, use the to get: oppo a57 2016 firmware

Officially, the OPPO A57 supports:

For – Android 7.1.1, ColorOS 3.2: