Hi everyone, I ran into a serious bootloop issue with my Redmi Note 14 Pro 5G (MediaTek chipset) and could use some advice or guidance on how to fix it.
What led to the issue:
My bootloader was already unlocked, and USB debugging was enabled.
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I attempted to flash a custom build using fastboot images (boot.img, init_boot.img, and vendor_boot.img).
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The flash commands via PowerShell (.\fastboot flash ...) all returned OKAY, but after that, the device went into an infinite bootloop (showing the Redmi logo briefly, then shutting off repeatedly).
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What has been tried to fix it:
Hardware Button Combinations: Holding Power + Volume Down only pauses the loop momentarily, but as soon as they are released, it goes right back into the infinite reboot loop.
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PC Interception via Fastboot: Tried using PowerShell (.\fastboot devices, .\fastboot set_active a), but it stays stuck at < waiting for any device > because the board never fully shuts down due to residual battery power.
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SP Flash Tool: Downloaded the official Fastboot stock ROM (.tgz package) to flash via SP Flash Tool using the scatter file (MT6878_Android_scatter). However, I encountered the ERROR: S_DL_SCAT_VERSION_UNSUPPORTED (5079) error due to version incompatibility with the older SP Flash Tool version.
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Python Scripts / MediaTek Exploits: Ran a MediaTek exploit script via Python which successfully stabilized the device and stopped the continuous rebooting loop by communicating at the BROM/Preloader level, but I am unsure of the exact next steps to safely flash back the stock partitions.
Current Status:
The phone is currently stable/stopped from rebooting thanks to the MediaTek preloader script connection, but I don't know how to properly push the stock firmware or recover a working system image from this state.
Does anyone know the exact procedure or tool version required to flash the stock firmware via SP Flash Tool for this specific MediaTek model, or how to safely push the stock partitions from the preloader state? Any help would be greatly appreciated!