Ancient OS Flashing Instructions

- Reboot to bootloader (fastboot)

- Connect phone to PC

- Flash Miui 12.5 version (with mi flash tool or bat script)

- Boot to homescreen of miui & reboot to bootloader

- fastboot flash boot boot.img

- fastboot flash vendor_boot vendor_boot.img

- fastboot reboot recovery

- Select Wipe data/factory reset & confirm

- Go back and select Apply update from ADB

- adb sideload AncientOS***.zip

- After installation complete, Reboot system.