In the May 2025 update for Pixel devices, Google has included an important notice for Pixel 6 and Pixel 8 owners regarding a new bootloader. Once users update to this latest release, they will no longer be able to revert to earlier versions of Android 15.
For many, especially those unfamiliar with rolling back Android versions or flashing factory images, this may not be significant. However, for enthusiasts who like to experiment with their devices, it’s crucial to be aware of this limitation. If the May update introduces changes you find unfavorable, the inability to roll back could be frustrating.
According to the factory images page, the May 2025 update for the Pixel 6, 6 Pro, and 6a, as well as the Pixel 8, 8 Pro, and 8a includes a “bootloader update that increments the anti-roll back version.” This means you won’t be able to flash or boot previous Android 15 builds after this update. While most users won’t encounter this situation, it’s useful information to keep in mind:
Warning: The May 2025 update for Pixel 6 (6, 6 Pro, 6a) and Pixel 8 (8, 8 Pro, 8a) devices introduces a bootloader update that increases the anti-roll back version. This prevents devices from reverting to earlier versions of the bootloader. After installing the May 2025 update, you will not be able to flash or boot older Android 15 builds.
Google has provided a workaround for these issues, suggesting that users can flash an OTA image of the latest build to create a bootable bootloader in the inactive slot of their device, thereby ensuring seamless updates. This can help resolve any flashing problems.
For further details, visit the factory images page for Pixel devices.