Oppo A57 Firehose - File

: In EDL mode, the phone’s hardware is waiting for instructions, but it won’t talk to just any software. The Solution : The Firehose file is sent to the phone's RAM via the Sahara protocol

This file acts as a "digital key" that bypasses the standard Android OS to allow deep-level system repairs. Why the Firehose File is Critical Unbricking Dead Devices: oppo a57 firehose file