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Use QFIL – Qualcomm Flash Image Loader

Home How to Use QFIL – Qualcomm Flash Image Loader

Whenever you want to install a stock firmware to any Qualcomm smartphone you may use Qualcomm Flash image Loader or QFIL. Just follow this instruction “How to use QFIL” and you will get required result.

Only flash your device at your own risk. For use the QFIL tool you need only a Qualcomm based device and Windows PC. If you use any other device, this will not work for you.

How to use QFIL guide:

    1. Download and install this Qualcomm USB Driver to your Windows PCQualocomm driver download install
  1. Download and extract to any convenient folder Qualcomm Flash Image Loader
  2. Open QFIL.exe file in the folder. You will see window like this:QFIL.exe folder
  3. Next step is switching off your device to start the updatepower menu to switch off your phone
  4. When your smartphone is switched off, press “Volume Up Key” and connect it to the PC via USB cable
  5. Press “Browse” button and locate your firmware’s folderQFIL browse firmware
  6. Choose the .mbn file and other file that QFIL will ask you in this folderQFIL open firmware files mbn patch
  7. Now just click on the “Download” button to start flashing the new firmware to your phoneQFIL start flashing download button
  8. Installing may take 5-15 minutes, so at this time just keep calm and don’t touch your phone and USB cable
  9. When Flashing is done your smartphone will reboot automatically

That’s all, now you can use the new firmware. As you can see the installation process, though somewhat long, but not very complicated.

Known issues when installing firmware via QFIL

  • Download button not active – it means that your phone isn’t connected or connected not properly. For activate the Download button just make sure:
    • Qualcomm Driver is installed
    • Your Phone connected to PC by holding Volume up button
  • Errors in the process if installing a new ROM – try to repeat the whole process, following this instruction
  • Use only quality USB cable

If you still have any questions, feel free to ask them in the comments below.

Bootloader mode

The bootloader mode is the first and possibly the most important part of the Android OS. The loader, as the name implies, loads the boot image, scans the entire system for errors and custom parts. Some of them can be corrected without user intervention, and some require attention.

When you boot a device in the bootloader mode it gives you the opportunity to choose where system will go:

  1. System
  2. Recovery mode
  3. Fastboot mode
  4. Other modes

Bootloader mode

And now is the main question: “Why you need to know what is bootloader mode and why is it neccessary to unlock it?”. As I said earlier, bootloader scan system for a custom software, so if you want to install any custom rom or even custom recovery – you need to disable this check, or device will not boot, or will be factory reseted.

To disable bootloader check, you just need to unlock it. Be careful, the unlocked bootloader can lead to a loss of warranty!

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