You can also explicitly specify a preloader file using the --preloader flag if the automated detection fails:

Hold the (or both Volume keys) and connect the USB cable.

The preloader is a critical piece of software that your Redmi 9C needs to start. When it is missing or damaged, your phone becomes a brick. However, with the correct preloader file—obtained from the stock Fastboot ROM—and the right tools like SP Flash Tool or specialized bypass utilities, you can often bring your device back from the dead.

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