Last updated: 2025 Target OS: Android 10/12 or Yocto Linux for A133

Select the disk drive of your SD card, load the firmware image, and click "Burn."

The A133 typically runs a customized (10/12/13) or Linux (Yocto/Buildroot) BSP provided by Allwinner. “Firmware” here includes:

If you encounter issues during or after the update process, use these troubleshooting strategies to resolve them. PC Does Not Recognize the Tablet

If your tablet is stuck on the boot logo or crashing constantly, flashing a clean stock ROM completely wipes the corrupted system partition and restores factory functionality.

sunxi-fel write 0x40000000 boot.img sunxi-fel exec 0x40000000

: Android hosting communities like XDA Developers and 4PDA maintain extensive archives of stock ROMs compiled by board ID.

Look for a printed string on the green circuit board (PCB), such as CB-M-R-U-94V-0 or similar Search by ID:

One of the most exciting recent developments for the Allwinner A133 is the dedicated effort from the open-source community to add support. This is a huge deal because it means the chip will be fully supported by the standard Linux kernel, freeing it from reliance on outdated, vendor-specific software.

Disable Windows Driver Signature Enforcement if the driver fails to install automatically. Download and install on your computer. Step 2: Load the Firmware Image Launch PhoenixSuit . Click on the Firmware tab at the top of the interface.