Oppo F3 firmware flash file is available to the download right from here…
Oppo F3 android version in this flash file is Marshmallow
Download OPpo F3 firmware flash file model CPH1609
File Name – Oppo F3 Flash File – CPH1609EX_11_OTA_0040_all_201704261515.ozip
Device – Oppo F3 CPH1609
Android Version – Marshmallow 6.0
Download Link –