Check your purchase history on AliExpress, Amazon, or eBay. Messaging the seller is the safest way to get a file guaranteed to work with your specific screen resolution and CANbus settings.
Plug the USB into the head unit's 4-pin or 6-pin USB port. Trigger the Update: ac8257 firmware new
Ensure your car is running or connected to a battery charger. If the unit loses power during the flash, it may never turn on again. Check your purchase history on AliExpress, Amazon, or eBay
Firmware updates usually wipe all data. Back up your offline maps and login credentials before starting. AC8257 Specs CPU Octa-Core Cortex-A53 GPU PowerVR Rogue GE8300 Connectivity 4G LTE / Wi-Fi / Bluetooth 5.0 Common OS Android 10, 11, or 12 (API level 29-31) If you'd like to find the exact file you need, tell me: The Build Number from your settings The Brand of the unit (if any) The Screen Resolution (e.g., 9-inch or 10-inch) Trigger the Update: Ensure your car is running
If your unit uses the XYAUTO interface, there are often public-facing cloud folders (Google Drive or Mega) maintained by the community that host the latest .zip or .bin files. How to Install the Update
Once you have the correct "new" firmware file, follow these steps to flash the device:
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