Vbmeta Samsung M31 Guide

Enable OEM Unlocking → Enter Download Mode → Long press Vol Up to unlock. (Wipes data, triggers KG Prenormal state).

You are trying to flash an older vbmeta than the bootloader currently expects. Samsung’s "anti-rollback" prevents downgrading. Fix: You must flash the vbmeta extracted from the latest firmware version for your region (e.g., M315FXXU5GVL1). Re-download the newest stock ROM. vbmeta samsung m31