Master the QUSB Bulk CID driver, and you master Qualcomm emergency flashing.
To resolve issues with the QUSB Bulk CID driver, try: qusb bulk cid driver
You attempted to flash an incompatible bootloader, a corrupt partition, or interrupted an OTA update. Upon reboot, the screen stays black, and connecting to a PC makes the "Unknown USB Device" or "QUSB_BULK" sound. Master the QUSB Bulk CID driver, and you