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These are the instructions on How to use Qualcomm Flash Image Loader (QFIL) tool to flash stock firmware on any Qualcomm Device.
Requirements: This tool only works on Qualcomm Device only. If in case you are having a device which is not powered by Qualcomm Chipset then this will not work for you.
Step 1: Download and install Qualcomm USB Driver on your Computer (if you have already installed the Qualcomm USB Driver on your Computer then SKIP this step).
Step 2: Download and extract Qualcomm Flash Image Loader (QFIL) on your computer. After extracting, you will be able to see the following files:
Step 3: Now, Open QFIL.exe.
Step 4: Once QFIL is launched, you will be able to see the following screen on your computer:
Step 5: Now, Switch Off your Smartphone or Tablet.
Step 6: Once your Device is Switched Off, Press and Hold Volume UP Key and Connect the Device to the Computer using USB Cable.
Step 7: Now, In QFIL, Click on Browse Button and locate the Firmware (.mbn).
Step 8: Once, you have added the firmware file, QFIL will automatically load the rest of the firmware data.
Step 9: Now, Click on the Download button to begin the Flashing Process.
Step 10: Flashing Process may take upto 10-15 minutes to complete.
Step 11: Once Flashing process is completed your device will be reboot automatically.
Thats It, We are done!. Now disconnect your device from the computer and setup everything on your device to use it.
Keep in Mind:
[*] Download Button Not Appearing? Download button will only become active when your device is connected properly. Make sure you have installed the Qualcomm Driver and connected the device to the computer by Holding the Volume UP key.
[*] Caution: Take a backup of your important data before using the QFIL Application, as your personal data will be deleted after flashing the stock firmware using QFIL Application.
[*] Alternative Tool: There are several alternative tools are available that allows you to flash stock firmware on your Qualcomm Device including Qualfast, Qcom Phone Download Tool, eMMC DL Tool, GNQC Download Tool and Xiaomi Mi Flash Tool.
[*] Credits: Qualcomm Flash Image Loader is created by Qualcomm Mobility LLC. So, full credits goes to them for sharing the application for free.