If edl.exe can open the COM port, the problem is strictly QFIL software corruption.
: Using incorrect or outdated Qualcomm HS-USB QDLoader 9008 drivers is the most frequent cause.
Reconnect your phone in EDL mode and check Device Manager. It should explicitly read: Qualcomm HS-USB QDLoader 9008 (COMxx) . 2. Disable Windows Driver Signature Enforcement
If the error persists after these steps, you may need to check if your device requires a test point
Qualcomm flashing requires high-speed, uninterrupted data stability.
Antivirus or Windows Security blocking the COM port. Solutions to Fix "QFIL Failed to Open COM Port Handle" 1. Reinstall/Update the Qualcomm USB Drivers
Raj frowned. He unplugged the USB cable, held his breath for ten seconds (a ritual), plugged it back in. Device Manager chirped. COM14 reappeared. He tried again.
Device Manager blinked. The port reappeared—not as COM14, but as COM5. A new address. A clean slate.
Press Ctrl + Shift + Esc to open Task Manager. Look for adb.exe or fastboot.exe under background processes. Select them and click End Task . Change the COM Port Number: Open Device Manager and expand Ports (COM & LPT) .
