: If a device stays in EDL mode for too long before you click "Download," the connection may time out, leading to a "Sahara Fail" or COM port error. Step-by-Step Fixes for "Failed to Open COM Port Handle" 1. Verify Device Manager Status
: Another application (like a terminal emulator or another flashing tool) may already be using the COM port. qfil failed to open com port handle
: The standalone version of QFIL is prone to more bugs than the version bundled with the full Qualcomm Product Support Tool (QPST). : If a device stays in EDL mode