Allwinner A133 Firmware Updated -

The primary driver for this update is security. The previous firmware versions (pre-June 2024) contained vulnerabilities in the Trusted Execution Environment (TEE) and the bootloader. The new update integrates:

adb reboot bootloader
fastboot oem unlock   # or fastboot flashing unlock

On some A133 devices, unlock requires a key file from Allwinner.

If you have a branded tablet, visit the official support page. allwinner a133 firmware updated

  • Verify the update package – check MD5/signature, ensure it’s for the exact A133 board (e.g., A133‑V100 vs A133‑V200 have different DRAM timings).

  • Perform the update & validate
    After reboot, confirm bootloader, kernel, and userspace versions. Run a memory test and check peripherals (display, touch, Wi‑Fi). The primary driver for this update is security

    • This is the gold standard for raw firmware updates directly from Allwinner’s reference design.

    Prerequisites:

    Steps:

    Enter FEL: Hold FEL button (pin or physical button) → power on → release after USB detection. On some A133 devices, unlock requires a key

    Using sunxi-fel (Linux):

    # Check connection
sunxi-fel ver

    If you are manufacturing devices based on the A133, do not simply push Allwinner’s reference firmware to production. Instead: