For the Samsung Galaxy M31, the vbmeta partition is a critical security component that verifies the integrity of other partitions during boot. If you plan to install a custom recovery like TWRP or root your device, you must "patch" or disable this verification to prevent the phone from entering a bootloop.
: Unlocking the bootloader and flashing vbmeta forces a factory reset. Backup all photos, contacts, and personal data.
: This happens if the system partition was modified but the vbmeta verification check was not successfully bypassed, or encryption parameters failed.
If you already have Team Win Recovery Project (TWRP) or another custom recovery installed on your M31, you can flash the raw image file directly from your phone. vbmeta samsung m31
(Note: this erases all data). Getting the right stock firmware for your M31. Flashing TWRP after the vbmeta patch.
Error 3: Device Trapped in a Bootloop after Flashing Custom ROM/GSI
Use the latest stable version of Odin3 (v3.14.4 or newer) for Samsung devices. Method 1: Flashing Patched VBMeta via Odin (Recommended) For the Samsung Galaxy M31, the vbmeta partition
I can provide the exact file variants or next steps tailored to your specific setup. Share public link
When you turn on your Samsung Galaxy M31, the bootloader reads the vbmeta partition. This partition contains cryptographic hashes and public keys for all critical system partitions, including boot , recovery , system , and vendor .
If you are planning to proceed with this modification, please let me know: Backup all photos, contacts, and personal data
, you cannot simply use a "fastboot" command to disable verification because Samsung uses for flashing. 1. Requirements Unlocked Bootloader:
Once you have your vbmeta.tar file ready, follow these steps to flash it onto your device: Step 1: Boot the M31 into Download Mode Turn off your Samsung Galaxy M31 completely.
: The bootloader calculates the hash of these partitions and compares them against the keys stored in vbmeta.
: If you are installing a custom recovery immediately after, you must transition directly from the black screen transition into the recovery button combination ( Volume Up + Power ) without letting the phone attempt a standard system boot. Troubleshooting Common VBMeta Issues on the M31