How to Check and Change Current Active Slot on Android [Fastboot

Command failed fastboot: error: Device does not support slots fastboot_ error_ failed to identify current slot Execute the U-Boot command mtd list to know the current MTD partitions: mtd list 2 for FIP: only first slot is used, the second slot is empty; 1 for U fastboot get active slot failed ) error while executing ADB Fastboot Commands failed (Too

fastboot getvar currentslot Trying to flash a brand new Pixel 3 , but something looks wrong Some error messages and apparently stuck in fastboot