This usually happens if the file is corrupted. Try redownloading the package using a stable Wi-Fi connection.
Powering off and booting into recovery (Power + Volume Down). Selecting "Install from storage device." Alternatives: Custom ROMs oppo f3 nougat 711 official update download top
Since the update wasn't an OTA, the process required a manual flash. Here is the method that was officially recommended: This usually happens if the file is corrupted
Later that year, OPPO officially rolled out a major update to for the F3. oppo f3 nougat 711 official update download top
Download the firmware package (usually a .zip file) and place it in the root directory of your phone's internal storage. Turn off the phone.