The primary function of v2.39 is to write partition images to the device storage (NAND or eMMC). It supports the standard Rockchip update.img format, allowing users to unbrick devices or upgrade to custom ROMs.
Cause: You are trying to flash an RK3328 firmware onto an RK3399 device.
Fix: Verify your device's exact SoC using an app like CPU-Z (if bootable) or check the board's printed text. Download the correct firmware. rk android tool v239
Cause: The device is stuck in Mask ROM but cannot load the temporary loader.
Fix:The primary function of v2