| Problem | Solution | |--------|----------| | | Uninstall device → Check “Delete driver software” → Reinstall with signature enforcement disabled. | | Device keeps disconnecting | Use a USB 2.0 port (not USB 3.0) and a short, high-quality cable. | | Driver installs but no COM port | Go to View > Show hidden devices in Device Manager. | | Still shows “Unknown Device” | The phone is not in true EDL mode. Re-check key combo or use Test Point. |