Using a patched firehose requires precision, as using the wrong file can permanently damage the UFS storage. EDL Flashing Xiaomi (Qualcomm) devices : r/SuchareksGuides

: It is used by technicians for IMEI repair or fixing software issues like "hang on logo" when standard Fastboot flashing fails. How to Use the Patched Firehose File

: Xiaomi typically locks EDL flashing behind a "Mi Account Authorization" wall. The patched file—often named something like prog_ufs_firehose_sm7150_ddr.elf —modifies the handshake process to skip this check.

: When a device is "hard bricked," it may show a black screen and only be recognized as "Qualcomm HS-USB QDLoader 9008" by a PC. A patched firehose allows MiFlash or similar tools to send raw data to the device's storage.

The primary purpose of this file is to facilitate communication between a computer and the device’s hardware during deep-level recovery.