V10 — Qualcomm Flash Loader

After successful flash, the device will reboot automatically. If stuck, disconnect battery (if removable) or hold Power + Volume Down for 15 seconds.

Officially, the Flash Loader driver is a Windows-only USB class driver (based on WINUSB/WDF). However, the underlying protocol is well-documented by the open-source community. qualcomm flash loader v10

Modern QFL v10 implementations check the anti-rollback index (SW_ID). If an attempt is made to flash an older version of the loader or firmware on a device that has had its anti-rollback fuse blown, the operation is aborted. This prevents attackers from downgrading firmware to exploit known vulnerabilities. After successful flash, the device will reboot automatically