Download QFIL Flash Tool

To use QFIL Flash Tool on Oppo R9 Plus or R9s (Plus) after download, simply:

1. Extract QFIL flash Tool and open the folder, now run (launch) the QFIL flash tool as administrator.
2. Now extract the stock ROM or Firmware you downloaded and go back to QFIL flash tool.
3. Turn off your Oppo R9 Plus or R9s (Plus)
4. Now, you will have to press and hold down the Volume UP  and Power Button simultaneously.
5. You Connect your Oppo R9 Plus or R9s (Plus) to your PC with a good working USB cable.
6. Now, using the QFIL flash tool. Browse to locate the flash file and click on the download button. 
7. After the above step, the flashing will start on your Oppo R9 Plus or R9s (Plus).
8. The process should take around 10 to 15 minutes to complete. Be patient and wait till you see Flashing Completed.
9. After the above, your Oppo R9 Plus or R9s (Plus) will reboot automatically.
10. That’s all. Disconnect your Oppo R9 Plus or R9s (Plus) and enjoy.

Download QFIL Flash tool (latest version is preferable) from here.