On the device, go to: Settings → System → System Update This delivers the firmware directly from the manufacturer.
Before downloading any file, you must confirm your device's internal specifications to avoid "bricking" (permanently damaging) the box. YouTube·Think Frugal d9+pro+5g+firmware+download+high+quality
Designed specifically for your board revision. On the device, go to: Settings → System
Need assistance? Provide the exact build number from your current firmware for tailored support. On the device