You likely need to re-select your "CANbus" box model in the Factory Settings. Conclusion
ZWNAV firmware is the specialized operating system software that runs on your head unit’s hardware. Unlike the generic Android OS found on tablets, this firmware is tailored for automotive use, managing everything from the CANbus integration (steering wheel controls, AC display) to the specific audio processing chips in your dashboard. Why Should You Update Your Firmware? zwnav firmware
Ensure the USB is FAT32 and the file isn't buried inside a folder. You likely need to re-select your "CANbus" box
The unit will reboot several times. Do not turn off the car until the home screen reappears. Custom Firmware: Is it Worth It? Why Should You Update Your Firmware
If you’ve upgraded your car’s infotainment system with a ZWNAV Android head unit, you already know how much it transforms the driving experience. However, to keep that experience smooth, secure, and compatible with the latest apps, understanding is essential.