For more advanced troubleshooting, OPPO provides a desktop tool:
custom Nougat ROM .zip file along with the corresponding OpenGApps package (ARM64, Android 7.1, Nano/Micro variant) to retain Google Play Services. Step-by-Step Custom ROM Installation Guide Oppo F3 Nougat 7.1.1 Update Download
Disclaimer: This firmware is intended for the CPH1609 model only. Flashing incorrect firmware can damage your device. How to Install Oppo F3 Nougat 7.1.1 Update (Manual Method) For more advanced troubleshooting, OPPO provides a desktop
By following this detailed guide and properly preparing your device, you can enjoy a smooth and successful transition. If you find this update helpful, please share this guide to assist other Oppo F3 users. For more advanced troubleshooting