If the tool doesn't work, you can try to flash the "official" Australian Nougat ROM which some users have successfully used on other F3 variants.
Updated Android security patches to keep your data safe. download file firmware update oppo f3 nougat work
You are looking for firmware version CPH1609EX_11_A.20_180326 or similar. If the tool doesn't work, you can try
Remember: A working Nougat Oppo F3 is still a capable secondary phone—great for selfies, great for battery life, and now, great for productivity. Remember: A working Nougat Oppo F3 is still
The Oppo F3 was initially launched in May 2017, running Android 6.0 Marshmallow out of the box. However, recognizing the demand for modern features, Oppo rolled out an official update to Android Nougat (specifically version 7.1.1) for both the Oppo F3 and F3 Plus in early 2018.
A manual update or firmware flash will erase all data (contacts, messages, photos, etc.). Back up everything before you begin. When backing up, ensure your Google account credentials are saved, as verification may be required after the update.
The installation process may wipe your device. Back up all photos, contacts, messages, and important files to a computer or cloud storage.