If your bootloader is locked (OEM unlocking disabled) and you manage to corrupt the system/vendor partitions via an OTA failure or malware, the phone will enter a boot loop. You cannot flash via Fastboot because the bootloader is locked. Google’s official fix is to mail the phone to a repair center—they use proprietary EDL tools.
If you see an entry like or a generic "USB Serial Device" that appears and disappears, your phone is likely in its version of EDL/Recovery mode. Risks and Warnings pixel 6 edl mode
Run sudo lsusb before and after plugging in the phone. If your bootloader is locked (OEM unlocking disabled)
If your Pixel 6 is showing a black screen, refusing to boot, stuck in a bootloop, or displaying the dreaded "No command" error, there is one last lifeline: . If you see an entry like or a
: If your Pixel 6 enters EDL mode spontaneously, it often indicates a hardware failure