| Purpose | Description | |---------|-------------| | Unbrick / dead boot repair | Flash via SP Flash Tool or MTK Client when device shows no sign of life | | Bypass authentication | Unlock bootloader or disable verified boot (requires patched preloader) | | Force download mode | Allows connection even with damaged system partitions | | Developer debugging | Trace early boot issues via UART logs |
✅ Always download the preloader file matching your exact device model and region (e.g.,
angelica_global,angelica_in_global). Flashing a wrong preloader can hard-brick the device (no BROM detection). redmi 9c preloader file
Flashing just the preloader (without the rest of the firmware) is a targeted procedure. Do not use "Download Only" mode if you only want to replace the preloader. ✅ Always download the preloader file matching your
| Symptom | Likely Cause | Fix |
|---------|--------------|-----|
| SP Flash Tool error STATUS_SEC_INSUFFICIENT_BUFFER | Preloader rejects DA | Use MTK Bypass Utility or an authorized DA |
| Redmi 9C detected as MTK USB Port but not flashing | Preloader is corrupt or mismatched | Use BROM mode (test point) with MTK Client |
| Device completely dead (no PC detection) | Preloader overwritten with garbage | Requires external EMMC programmer (e.g., Easy JTAG, Medusa) | Flashing just the preloader (without the rest of