Backup, Edit, Restore Xiaomi 11T Pro QCN File and Repair IMEI

Steps to Repair and Fix IMEI number on Xiaomi 11T Pro (vili)

Here you will get an easy guide to repair and restore the IMEI number on your Xiaomi 11T Pro device by using the QCN Rebuilder Tool. This tool is free of cost and easy to use even if you’re new to this process. Now, before heading over to the guide, let’s follow all the requirements and download the links below.

Now, let’s check out the download links and requirements below.

Download Files:

• Download Flash tool: QFIL Tool
• Download Xiaomi 11T Pro QCN File: Not available, you can download genericIMEI.qcn
• Download Qualcomm QCN Rebuilder Tool

Backup QCN

By using this method, you can backup the QCN file for future resolution or you can help your friend who need the file to fix their IMEI or baseband version issue.

Pre-Requisites:

• QPST installed (which includes QFIL). You can download it here.
• Xiaomi and Qualcomm drivers installed. Download them here

Enable Diagnostics mode on your Xiaomi 11T Pro.

Using ADB mode: Connect your Xiaomi 11T Pro to the PC using the USB cable and enter the given command (make sure you’ve installed all required drivers). 

adb shell
su
setprop sys.usb.config diag,adb

For the second method, enter the service code *#*#13491#*#* and select the required connection

Note: If you’re using a custom ROM you can try the dialer method but most likely you will get nothing after dialing the code. If this is the case you still can enable the Diagnostics mode but you need root privileges. Open a Terminal Emulator app and type this:

su

setprop sys.usb.config diag,adb

Done. You’ve Enabled Or Disabled Diag Mode on the Xiaomi 11T Pro device.

Open QPST Tool to Backup QCN

1. Now open the QFIL and connect your device to the PC with the USB cable. Xiaomi 11T Pro should show as connected in Diagnostics Mode.
2. Now tap on the Select port and select your device and press OK.
3. Tap on the Tools tab and select QCN Backup Restore from the drop-down menu.
4. In the next window,  add any name to the QCN file with the .qcn extension. Make sure to select the “multisim” option and press Backup.
5. Once the backup is done, check the generated file size. A normal backup is around 310Kb, if your file is significantly lighter you can suspect a damaged file. In this case, I suggest installing stock ROM and using their dialer method.

IMEI Rebuilding and Restore Guide

• After downloading, install it and run the QCN Rebuilder tool on your PC.
• Click on Open file and select the Xiaomi 11T Pro QCN file.
• Now, replace the IMEI with the original IMEI number.
• Click on Rebuild.
• Next, connect your phone to a PC using a USB cable.
• Open the dial pad on your device and type this code *#*#717717#*#* or use any method to enable diagnostic mode.
• If the above code doesn’t work, use CMD on your PC by following the commands below.

adb shell
su
setprop sys.usb.config rndis,diag,adb

• Then run the QPST tool on your computer.
• Click on the Restore tab > select the rebuilt QCN file > click on Restore.
• You’re done.

That’s it, guys. We hope you’ve found this guide useful for your Xiaomi 11T Pro. If you’re facing any issues, feel free to ask in the comments below.