These tutorials provide step-by-step guidance on how to use custom preloader files to unlock or repair the Redmi 9C:

Working with the Redmi 9C preloader file requires advanced technical knowledge and specialized tools. Here are some general steps:

python mtk e metadata,userdata,md_udc --preloader=preloader_k65v1_64_bsp.bin

Because you already bypassed the protection in Step 1, SP Flash Tool will immediately begin writing data. A yellow progress bar will indicate active flashing.

Locate the images folder and ensure preloader_angelica.bin is present. Open SP Flash Tool. Step 2: Configure SP Flash Tool