When you connect an SDM439-QRD board (or a production phone based on it) to a Windows/Linux PC, the USB controller can present several identities:
Standard Android debugging over USB (using ADB) works with generic Google USB drivers. The SDM439-QRD USB driver serves entirely different purposes: sdm439-qrd usb driver
Disclaimer: Modifying device firmware using low-level drivers like the SDM439-QRD driver can void warranties, brick devices, or cause data loss. Proceed at your own risk. The author and platform assume no liability for damage to hardware or software resulting from the use of this information. When you connect an SDM439-QRD board (or a