QUSB_BULK_CID is a low-level hardware communication state typically encountered when a mobile device, most notably the Google Pixel 3 and 3 XL
If your device is identified as QUSB_BULK_CID, standard software fixes like "Factory Reset" or "Fastboot" will not work because the device cannot reach those modes. Authorized Repair: qusb bulk cid verified
Once you see “CID Verified”, you can safely flash full firmware to unbrick the device. qusb bulk cid verified
Firmware Integrity: In mobile forensics and hardware repair, QUSB interfaces often require CID verification to ensure that the diagnostic tools are communicating with an authentic device before pushing deep-level system images. qusb bulk cid verified