There are two primary methods to disable AVB on the Galaxy M31. The first, using a pre-patched vbmeta image, is generally easier. The second involves patching the vbmeta image from your own firmware, which is more reliable and ensures full compatibility with your specific device build.
Download the latest version of Odin3 for Windows.
If you see "error verifying vbmeta image: invalid", it usually means the bootloader is still locked or the vbmeta file you flashed doesn't match the current firmware version of your device. Always ensure you are using files from the exact firmware build currently installed on your
Locate the file within your downloaded firmware (it starts with AP_ ). vbmeta samsung m31
Download and install the latest Samsung USB Drivers on your computer.
avbtool make_vbmeta_image --flag 2 --output vbmeta_disabled.img Use code with caution.
Vbmeta acts as a "security guard" that verifies signatures on boot for other partitions like There are two primary methods to disable AVB
When you power on your Samsung Galaxy M31, the bootloader reads the vbmeta.img partition. This partition contains cryptographic hashes and public keys for all critical system partitions, including: boot (The kernel) recovery (Stock or custom recovery like TWRP) system (The core Android OS) vendor (Device-specific drivers)
Odin does not accept raw .img files. You must convert your vbmeta.img into a .tar archive. Right-click on your vbmeta.img file. Select 7-Zip > . Change the Archive format to tar and click OK. You will now have a flashable file named vbmeta.tar .
Back up all your data, as this process may trigger a factory reset. How to Download/Create Patched Vbmeta for Samsung M31 Download the latest version of Odin3 for Windows
Connect your USB cable to the PC, but connect it to the phone yet.
Flash the stock vbmeta.img back using Odin in the AP slot.
You did not unlock the bootloader properly. Ensure OEM Unlocking is enabled in Developer Options.
Connect your phone to your PC via a USB cable while holding down both the and Volume Down buttons simultaneously. Release the buttons when you see a warning screen.
: Boot your device back into Download Mode and re-flash the verified, disabled vbmeta.tar . Right after, boot into your custom recovery (or stock recovery) and execute a full Format Data (typing "yes") to clear cryptographic storage flags. Conclusion