Again Gsmdevelopers team come with exclusive and most wanted solution 


Simple Guide to Unbrick }-Oppo A57 [CPH1701]
Download Working Flash Tool :- MsmDownloadTool

Download Official ROM+Tool :-CPH1701EX_11_A.05_170120

If Ur Phone is Dead 
1. Now open MsmDownloadTool2. Press Start Button MsmDownloadTool

3. Press Volume Up+Down Button Then Usb Cable