Ensure your device is listed specifically as . If it is listed as "Unknown Device" or "QUSB_BULK," the drivers are not correctly installed. Clean Reinstall of QDLoader Drivers Uninstall any existing Qualcomm drivers from your PC.
Use the drivers found inside the QPST installation folder rather than generic standalone versions; these are often more stable. qfil failed to open com port handle
A device in 9008 mode draws more current than in normal operation (the PMIC is in a raw state). Many USB ports—especially front-panel ports, hubs, or laptop ports—cannot supply stable voltage. Ensure your device is listed specifically as
If you follow all these steps and the error persists, the device’s EDL interface might be damaged, or the motherboard has a hardware fault. Use the drivers found inside the QPST installation
✅ The most frequent fix is ensuring the device is correctly seen as Qualcomm HS-USB QDLoader 9008 in Device Manager and running QFIL with Administrative privileges while all other serial communication software is closed. If you are still stuck, could you tell me: What phone model are you trying to flash? Does the device show up as 9008 in Device Manager? Are you using a USB 3.0 (blue) or USB 2.0 port?