Open Oppo A57 flash tool folder, copy MsmDownoloadTool.exe file and paste it into firmware folder AGAIN.
Install Qualcomm HS-USb Qdloader 9008 driver & Qualcomm drivers
Here in this Oppo A57 flash method, we will boot device into edl mode or download mode to flash Oppo A57 flash files. After flash official firmware on Oppo A57, it will remove all software related issues and you can unbrick dead oppo A57 without effort. This method will allows you to flash dead Oppo A57 or soft bricked Oppo A57 mobile. Download Oppo A57 flash file or firmware, driver and flash tool and follow the complete tutorial as it is. Flash Oppo A57 Official Firmware| Oppo A57 Flash File : Here is quick guide to flash Oppo A57 mobile with Oppo A57 flash file.