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MTK UNBRICK GUIDE – AUTH V6 & LOCKED BOOTLOADER
Tested On: Redmi Note 11S (MT6781)
Confirmed Working If:
Bootloader is locked
Device is hard-bricked
You have Auth v6
Warranty remains valid
Play Store stays certified
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INTRODUCTION
Welcome to the ultimate MTK rescue guide.
This method brings back dead devices like the Redmi Note 11S without unlocking the bootloader, without losing warranty, and even bypasses Auth v6.
🛐 All glory to God and Jesus — they gave me the strength to never give up.
This guide is 100% tested and verified by me.
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DISCLAIMER
This guide is for educational purposes only.
You are responsible for your own actions and device.
Use at your own risk.
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REQUIRED FILES & TOOLS:
MTK Meta Utility
SP Flash Tool (v5.x recommended for stability)
Python + mtkclient (optional)
Patched lk.img (modify 1 byte in hex editor)
DA file (optional, helps avoid errors)
Full stock firmware (scatter, super, vbmeta, dtbo, etc.)
Drivers:
USBDK
VCOM
LibUSB
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STEP-BY-STEP GUIDE:
1. Patch lk.img
– Open in hex editor and corrupt any byte. (This prevents it from booting and forces BROM mode.)
2. Flash patched lk.img to both slot A and slot B.
3. Device will black screen and stop booting.
– This is expected and required. It’s now ready for bypass.
4. Connect the device to PC
– It will auto-enter BROM mode without pressing any buttons.
5. Open MTK Meta Utility
– Click "Disable Auth" (your device will freeze in BROM = perfect).
6. Launch SP Flash Tool (v5)
– Load your DA file and the scatter file from your own firmware.
7. Choose partitions to flash
– DO NOT flash preloader unless your device is fully hard bricked.
– Flash super, vbmeta, dtbo, cust, etc.
8. Click Download
– SP Flash Tool will start flashing while device stays frozen in BROM (auth bypass active).
9. When flashing is done, unplug the cable and hold the Power button.
10. Device should now boot up normally!
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IMPORTANT REMINDER:
❗ Do not use firmware, lk.img, or scatter files from other users or devices.
Always download the official firmware for your exact model and build version.
Use trusted sources:
https://xiaomifirmwareupdater.com
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CONGRATULATIONS!
Your device is now:
Restored
Bootloader still locked
Warranty safe
Play Store certified
All without paid tools or test points.
May this guide help many more.
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