Many Android head unit enthusiasts share stable firmware builds for specific chipsets.
Use a high-quality USB 2.0 or 3.0 drive (8GB to 32GB). Alpha Coustic Update Firmware
You may need to re-select your car manufacturer’s logo in the Factory Settings menu. Troubleshooting Common Issues Potential Solution USB Not Detected Many Android head unit enthusiasts share stable firmware
Many Alpha Coustic units will detect the files and ask "System Update Found. Start?" Click OK . Alpha Coustic Update Firmware
Note your current MCU and Build versions before starting. Step 1: Locating the Correct Firmware