A preloader file, also known as a bootloader or pre-bootloader, is a small piece of software that runs before the main operating system on a mobile device. Its primary function is to initialize the device's hardware, configure the memory, and prepare the environment for the operating system to boot. In essence, the preloader file acts as a bridge between the device's firmware and the operating system.
| Boot Stage | File Name | Function | Is it replaceable? | | :--- | :--- | :--- | :--- | | | preloader_cereus.bin | Initializes DRAM and loads LK | Yes (via SP Flash) | | Little Kernel (LK) | lk.bin | Secondary bootloader, shows logo | Yes | | Trusted OS | tee.bin | Security and encryption | Yes | | Boot Image | boot.img | Kernel + Ramdisk | Yes (via Fastboot) | | Recovery | recovery.img | Recovery mode | Yes | redmi 6 preloader file
Warning: If you are only trying to fix a minor bug, uncheck Preloader. Only flash it if the device is dead or won't connect. A preloader file, also known as a bootloader
When you press the power button, the Preloader is the very first piece of code that runs. Its job is to initialize the hardware (like the CPU, RAM, and storage) and load the Linux kernel, which then boots the Android operating system. Without a functioning preloader, the phone cannot communicate with a computer or start the boot process. | Boot Stage | File Name | Function | Is it replaceable
(e.g., MTK Meta Utility or MCT Bypass) to disable the secure boot protection. The Scatter File: Found inside the official firmware folder. How to Flash the Preloader File