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Edwin Aboryo
Edwin Aboryo

Redmi 5 Plus (Vince) QCN Backup and Restore Process


How to Download QCN File for Xiaomi Redmi 5 Plus




If you own a Xiaomi Redmi 5 Plus smartphone and you are facing some network-related issues such as no signal, no service, invalid IMEI, etc., then you may need to download a QCN file for your device. A QCN file is a backup of the network configuration settings of your device that can help you fix these problems. In this article, we will show you what is a QCN file, why you need it, how to download it, how to use it, and what are the benefits and risks of doing so.


What is QCN File and Why You Need It




QCN File is a backup of the network configuration settings of your device




A QCN file stands for Qualcomm Calibration Network file. It is a file that contains the information about the network settings of your device such as IMEI number, baseband version, radio frequency, carrier information, etc. A QCN file is usually stored in the EFS partition of your device, which is a protected area that stores important data related to your device's functionality.




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You need QCN File to repair IMEI number, baseband, and network issues on your device




Sometimes, due to various reasons such as flashing custom ROMs, rooting, unlocking bootloader, etc., you may lose or damage the network configuration settings of your device. This can result in various network-related problems such as no signal, no service, invalid IMEI, unknown baseband, etc. To fix these problems, you need to restore the original network configuration settings of your device using a QCN file. A QCN file can help you repair the IMEI number, baseband version, radio frequency, carrier information, etc. of your device and restore its normal functionality.


How to Download QCN File for Xiaomi Redmi 5 Plus




You can download QCN File from various sources online or create your own QCN File using QCN Rebuilder tool




There are two ways to get a QCN file for your Xiaomi Redmi 5 Plus device. One way is to download it from various sources online such as forums, websites, blogs, etc. However, you need to be careful when downloading a QCN file from online sources as it may not be compatible with your device model or firmware version. You also need to check the authenticity and integrity of the QCN file before using it.


The other way is to create your own QCN file using a tool called QCN Rebuilder. This tool allows you to extract the QCN file from your device or from another compatible device and modify it according to your needs. You can also use this tool to replace the original IMEI number with the one on the QCN file using QCN Rebuilder tool. This way, you can create a custom QCN file that suits your device and firmware version.


You need to enable USB debugging and diagnostic mode on your device before downloading or creating QCN File




Before you can download or create a QCN file for your Xiaomi Redmi 5 Plus device, you need to enable some settings on your device. First, you need to enable USB debugging mode on your device. This mode allows you to connect your device to your computer and perform various operations such as flashing, rooting, etc. To enable USB debugging mode, you need to follow these steps:


  • Go to Settings > About phone and tap on MIUI version seven times to enable Developer options.



  • Go back to Settings > Additional settings > Developer options and enable USB debugging.



  • Connect your device to your computer using a USB cable and allow USB debugging permission on your device.



Next, you need to enable diagnostic mode on your device. This mode allows you to access the EFS partition of your device and read or write the QCN file. To enable diagnostic mode, you need to follow these steps:


  • Dial *#*#717717#*#* on your device's dialer app and wait for a few seconds.



  • You should see a message saying "Diag mode enabled" on your device's screen.



  • If not, you may need to install the Qualcomm drivers on your computer and try again.



How to Use QCN File to Repair IMEI Number on Xiaomi Redmi 5 Plus




You need to use QPST tool to restore QCN File on your device




Once you have downloaded or created a QCN file for your Xiaomi Redmi 5 Plus device, you need to use a tool called QPST (Qualcomm Product Support Tools) to restore it on your device. QPST is a software that allows you to communicate with Qualcomm devices and perform various tasks such as flashing, backup, restore, etc. To use QPST tool to restore QCN file on your device, you need to follow these steps:


  • Download and install QPST tool on your computer from this link.



  • Launch QPST Configuration from the Start menu and click on Ports tab.



  • Add a new port by clicking on Add new port button and select the COM port of your device. You can check the COM port of your device from Device Manager > Ports (COM & LPT).



  • Click on Start Clients > Software Download from the QPST Configuration window.



  • Select the Backup tab and click on Browse button next to QCN File.



  • Select the QCN file that you have downloaded or created for your device and click on Open.



  • Click on Start button and wait for the process to complete.



  • You should see a message saying "QCN Restore Completed" on the Software Download window.



You need to replace the original IMEI number with the one on the QCN File using QCN Rebuilder tool




If you have downloaded a QCN file from online sources or from another compatible device, you may need to replace the original IMEI number with the one on the QCN file using QCN Rebuilder tool. This is because each device has a unique IMEI number that identifies it and using a different IMEI number may cause compatibility issues or legal problems. To replace the original IMEI number with the one on the QCN file using QCN Rebuilder tool, you need to follow these steps:


  • Download and extract QCN Rebuilder tool from this link.



  • Launch QCN Rebuilder.exe from the extracted folder and click on Open file button.



  • Select the QCN file that you have downloaded or created for your device and click on Open.



  • You should see the IMEI number of the QCN file in the tool's window.



  • Replace it with the original IMEI number of your device. You can find the original IMEI number of your device by dialing *#06# on your device's dialer app or by checking the sticker behind the battery or the box of your device.



  • Click on Rebuild button and save the new QCN file with a different name.



  • Use QPST tool to restore the new QCN file on your device as explained in the previous section.



Benefits of Downloading QCN File for Xiaomi Redmi 5 Plus




You can fix various network-related problems on your device such as no signal, no service, invalid IMEI, etc.




One of the main benefits of downloading a QCN file for your Xiaomi Redmi 5 Plus device is that you can fix various network-related problems on your device. Sometimes, due to various reasons such as flashing custom ROMs, rooting, unlocking bootloader, etc., you may lose or damage the network configuration settings of your device. This can result in various network-related problems such as no signal, no service, invalid IMEI, unknown baseband, etc. By restoring the original network configuration settings of your device using a QCN file, you can fix these problems and enjoy a smooth and stable network connection on your device.


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You can restore the original network configuration settings of your device in case of any damage or corruption




Another benefit of downloading a QCN file for your Xiaomi Redmi 5 Plus device is that you can restore the original network configuration settings of your device in case of any damage or corruption. Sometimes, due to various reasons such as malware infection, software update, hardware failure, etc., you may experience some issues with the netwo


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