Backup all your important data before flashing the Huawei P40 Lite stock firmware, because installing firmware will erase all your data.
Google Nexus 9 has two outstanding features Nvidia Tegra K1 chipset and Corning Gorilla Glass 3, it’s make this phone very smooth and fast.
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1. Download the firmware.
2. Extract to a flash driver at list 4 GB.
3. All files should be as it's in the archive.