This firmware is specific to Oppo chinese version, not recommended for Oppo global version, if you are looking for Oppo Firmware Global version Please follow Link Oppo Firmware.
You Need Install PdaNet and Oppo Codemeter for flashing ofp File.
Ofp Firmware Oppo A83 Chinese Version41.A83_11_A.21_180514_bee5369c.rar
Type: Flash File Size: 2.6GB
Download via Google Drive