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).
Below is a draft blog post providing an overview of the preloader, its use cases, and how to use it safely. Redmi 6 (Cereus) Preloader: What It Is and How to Use It redmi 6 preloader file
When performing maintenance or repairs, the preloader file is usually found within the or Fastboot ROM folder. When you connect a Redmi 6 to a
