Before flashing a completely different firmware (e.g., going from Android 6.0 to 7.1), always click first while in Mask ROM Mode. This wipes residual low-level configuration that may brick the device.
: Install the necessary Rockchip USB Drivers on your Windows PC to ensure the device is recognized. Rk Android Tool V2.7.1
: If flashing individual partitions, ensure the addresses (offsets) match your device’s parameter file. Before flashing a completely different firmware (e