Here is a comprehensive guide to troubleshooting and resolving this issue.
: Low-quality USB cables or ports can cause intermittent connection failures. Step-by-Step Solutions 1. Verify Device Manager Status qfil failed to open com port handle
You may need to disable in Windows settings to allow unsigned Qualcomm drivers to install properly. Here is a comprehensive guide to troubleshooting and
The "Failed to open COM port handle" error in QFIL (Qualcomm Flash Image Loader) qfil failed to open com port handle
What I've tried so far: