Download the firmware and extract the contents. Move the required update files (often update.zip ) directly to the root directory of the USB drive (not inside a folder). Initiate Update: Insert the USB into the head unit's OTG port. A prompt should automatically appear. If not, go to Settings > System > System Upgrade and select Local Upgrade The process usually takes 7–15 minutes . The unit will reboot automatically once finished. Method 2: Online (OTA) Update
Firmware is device-specific based on screen resolution and MCU (Microcontroller Unit) versions.
: You will need a high-quality, empty USB flash drive or SD card (max 32GB) formatted to FAT32 . 2. How to Obtain Firmware for Free