These are instructions on how to Restore the QCN file on Qualcomm Devices using the QFIL Flash Tool.
Restore QCN File on Qualcomm Devices
- Download and install Qualcomm USB Driver on the Computer. If in case Qualcomm Drivers are already installed on the computer, then SKIP this step.
- Download and install QPST Tool on the Computer. If in case QPST Tool is already installed on the computer, then SKIP this step.
- Launch the QFIL Tool (auto-installs with the QPST Tool) from the Start Menu or through the C:\Program Files (x86)\Qualcomm\QPST\bin Folder:
- Once the QFIL Tool is launched, you will be able to see the following window:
- Enable Developer Options on your device. To Enable Developer Options: Open Settings > About Phone > Tap on the Built Number/MIUI Version for 6-8 times until developers option is enabled.
- Enable USB Debugging on your device. To Enable USB Debugging: Open Settings > Developer Options > Tap on the USB Debugging checkbox to Enable it.
- Enable Diag Mode on your device. To Enable Diag Mode: Dial *#*#13491#*#* or *#*#717717#*#* or *#*#717717#*# and Tap on the Diag,Serial_SMD,RMNET_BAM,ADB option and then Tap on the OK button.
- Connect the Device to the Computer using the USB cable.
- In QFIL Tool, Click on the Select Port button:
- Select the Port and Click on the OK button:
- Click on the Tools menu and Select QCN Backup Restore option.
- Under QCN Backup Restore, Click on the Browse button and Locate the QCN file on the Computer (assuming you have already downloaded the QCN file or taken the QCN Backup):
- Click on the Restore QCN Button:
- Restoring process will begin and may take a few seconds to complete.
- Once the Restore process is completed, you will be able to see the Restore Succeed message on the tool.
![usb logo](https://cdn.androidmtk.com/wp-content/uploads/usb.png)
![QPST Setup](https://cdn.androidmtk.com/wp-content/uploads/qpst-setup.png)
![QFIL QPST Folder](https://cdn.androidmtk.com/wp-content/uploads/qfil-qpst-folder.png)
![QFIL Tool Launched](https://cdn.androidmtk.com/wp-content/uploads/qfil-launched.png)
![Xiaomi About MiUi](https://cdn.androidmtk.com/wp-content/uploads/xiaomi-about-miui.jpg)
![Xiaomi Developers Option](https://cdn.androidmtk.com/wp-content/uploads/xiaomi-developers-option.png)
![Diag Menu](https://cdn.androidmtk.com/wp-content/uploads/diag-menu.png)
![Mobile Connected Computer](https://cdn.androidmtk.com/wp-content/uploads/connect-mobile-computer.png)
![QFIL Select Port](https://cdn.androidmtk.com/wp-content/uploads/qfil-select-port.png)
![QFIL Select Port OK](https://cdn.androidmtk.com/wp-content/uploads/qfil-select-port-ok.png)
![QFIL Tools Menu](https://cdn.androidmtk.com/wp-content/uploads/qfil-tools-menu.png)
![QCN backup Restore Browse](https://cdn.androidmtk.com/wp-content/uploads/qcn-backup-restore-browse.png)
![QFIl Select QCN](https://cdn.androidmtk.com/wp-content/uploads/qfil-select-qcn.png)
![QFIl Restore QCN](https://cdn.androidmtk.com/wp-content/uploads/qfil-restore-qcn.png)
![QFIL QCN Restoring](https://cdn.androidmtk.com/wp-content/uploads/qfil-qcn-restoring.png)
![QFIL QCN Restore Success](https://cdn.androidmtk.com/wp-content/uploads/qfil-qcn-restore-success.png)
Congratulations! You just learned to restore the QCN File on the Qualcomm Devices.
Notes
[*] The above can be used to restore the QCN file on Xiaomi, Vivo, Oppo, ZTE, OnePlus, and other devices having Qualcomm Chipset.
[*] Enabling Diag Mode: Above we have shared three codes, i.e., *#*#13491#*#*, *#*#717717#*#*, and *#*#717717#*#. These three codes can be used on Xiaomi Devices to Enable the Diag Mode. To Enable Diag Mode, you may have to enter the correct Diag Mode code; for example, if you have Vivo devices, you have to Dial *#558# in Step#7 to Enable the Diag Mode.
[*] Credits: QPST Tool is created and distributed by Qualcomm Mobility Inc. So, full credit goes to them for sharing the tool for free.