The preloader is always included within the package (not the Recovery zip). You can find it in the /images/ folder of the extracted firmware archive. Official downloads are available through the Xiaomi Community ROM section . Redmi 6/ 6A | How To Unbrick Cactus/ Cereus Using Easy Way
In MediaTek-based Android devices like the Xiaomi Redmi 6 (codenamed preloader file (usually named preloader_cereus.bin redmi 6 preloader file
When you connect a Redmi 6 to a PC while holding Volume Up (or using testpoints), the Preloader does not fully boot the device — instead, it enters Download Mode (also called Preloader USB mode). The preloader is always included within the package
The is a small, standalone binary file (often named preloader_cereus.bin ) extracted from the official firmware. It allows repair tools to forcefully overwrite the corrupted bootloader, effectively reviving the device. Redmi 6/ 6A | How To Unbrick Cactus/
You typically need this file in four critical scenarios:
: You cannot swap preloaders between the Redmi 6 and 6A despite having similar hardware. They use different digital signatures; cross-flashing will result in a device that cannot boot.
: In some cases, a custom Download Agent (DA) file is required alongside the preloader to successfully read or write data to the device's memory. Recovery and Unbricking Steps