How to fix Xiaomi Redmi Note 4 Bootloop using cust.img

First method:

Basically this method is about deleting everything from cust.img file. What’s required?

  1. Download Latest China Stable or China Developer Version ROM from http://en.miui.com/a-234.html
  2. Download SP_Flash_Tool
  3. Download clear cust.rar
  4. Unpack and replace the original cust.img file (around 500 mb) with the new file (6kb).
  5. Launch SP flash tools and select MTK_AllInOne_DA.bin
  6. Press “Download” and connect your device via USB cable
  7. Wait for the flashing, disconnect your smartphone and then reboot

Second method on how to unbrick with global cust.img:

  1. Download Latest China Stable or China Developer Version ROM from http://en.miui.com/a-234.html
  2. Download cust_global.rar (2.9 mb)
  3. Unpack and replace the original cust.img file (around 500 mb) with the new file (2.9 mb).
  4. Open Smart Phone Flash Tool
  5. Go to “Download” section
  6. Remove the mark against “preloader”
  7. Press “Download”
  8. Wait for the flashing, disconnect your smartphone and then reboot