A progress bar will appear. Do not touch the cable or the device during this time.
On the tablet, press and hold the button (some models use Volume Down or the Reset button).
Here are key takeaways to guide your firmware journey: Allwinner A133 Firmware
When loading SPL code, SRAM buffers must be swapped to avoid overwriting critical BROM data. The swap buffers for the A133 are configured as shown in the diagram above.
PhoenixSuit is the official Windows application used to flash .img firmware directly from a computer to the tablet via a USB cable. It supports both "Upgrade" mode (keeps data) and "Format" mode (wipes everything). LiveSuit (Linux/Mac Alternative) A progress bar will appear
If your computer cannot detect the device via USB, PhoenixCard is your best alternative. This tool burns the .img firmware onto a MicroSD card, turning it into a bootable recovery drive. When inserted into the A133 device, it automatically forces a firmware rewrite upon boot. 4. Step-by-Step Guide: How to Flash Allwinner A133 Firmware
As of 2025-2026, the A133 remains in active production for industrial use. You will see firmware updates for the following: Here are key takeaways to guide your firmware
Installing the wrong firmware can permanently brick your tablet. Because many manufacturers use the same A133 chip but different LCD panels, Wi-Fi modules, or touchscreens, you must use the firmware designed specifically for your device model number. Methods to Find Your Firmware:
Once completed, a "Firmware Upgrade Succeeds" popup will appear.
The most common tool for flashing Allwinner devices (Windows). USB Drivers: Allwinner ADB drivers.