Tutorials Backup, Restore and Repair IMEI using Qpst Qualcomm tools

Here we will utilize QCN files from Qpst Qualcomm tools. Qcn file is soc Qualcomm devices configuration file like efs/imei, modem, network, baseband or modem, so with this file, we can fix the problem between invalid IMEI or NULL or blank on baseband version.

Prepare:

  1. PC/Notebook Window OS
  2. USB cable
  3. Download and Install ADB Driver on PC
  4. Download and extract ADB Fastboot tools on PC
  5. Download and install Qualcomm Tools aka QPST
  6. Download and install Qualcomm Drivers
  7. at your android mobile go to “Settings->System>About phones” then tap 7x at “Firmware Versions (MIUI/ZUI/FUI/more UI)” until a notification appears “you are developer“, now you can back to “Setting->System->Developer Option” for activate “USB debugging” and  “OEM unlocking
  8. Set configuration between your android mobile with PC
    • Activate DIAG mode on your android phone
      – Using Phone dial (No root required)

      *#*#717717#*#*

      – Using ADB Fastboot tools (No root required)
      Open CMD Window 7 -> Go to Adb Fastoot tools folder then Press Shift+Right to click on keyboard or mouse and select Open command window here (CMD) and then type the command

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

      Open CMD Window 8/10 -> Search cmd.exe and open with double click cmd.exe, see at your CMD if your command at C://user/…. you should move or copy ADB Fastoot tools folder to C://user/…. and then type the command

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

      – Using Terminal Emulator.apk (Root required)

      su
      setprop sys.usb.config diag,adb

      – Window 7 -> Go to Adb Fastoot tools folder than Press Shift+Right click on keyboard or mouse and select Open command window here (CMD)
      – Window 8/10 -> Search cmd.exe and open with double click cmd.exe, see at your CMD if your command at C://user/…. you should move or copy ADB Fastoot tools folder to C://user/….

    • Check your Driver in device manager. Have already seen Port Qualcomm HS-USB Android DIAG 901D like this?[​IMG]
    • Open QPST Configurationhttps://s25.postimg.cc/yoa1r6mn3/mifans_tutorial_backup_restore_qcn2.jpg
    • Check your port, has it been detected?Tutorials Backup, Restore and Repair IMEI using Qpst Qualcomm tools
      MSM* is board, my board is COM41, the name can be different according to each android device.
    • click the button >Start Clients > Software Download like the picture above or you can go to
      C:\Program Files\Qualcomm\QPST\bin\Download.exe (open as administrator)

     

1) How To Backup QCN
Navigate to the backup tab and select QCN File, for example with the name cancer-Miya-ke7.qcn and make sure the SPC is 000000.

[​IMG]

then click Start to start backing up, wait until 100% and the progress is complete

[​IMG]
[​IMG]

 

Your file.qcn by default location in C:\Program Files\Qualcomm\QPST\bin \, find and save the file well.

 

2) How To Restore QCN file
Navigate to the backup tab

[​IMG]

Select the file. Qcn you want to restore and click Start.

[​IMG]

Done.

 

3) How To Fix Invalid or Unknown IMEI on Android Mobile Devices

If you have backup qcn, just restore your Qcn File, but if you do not have the backup you must record your IMEI first, usually located behind the battery or cardboard.

  • Connect the USB cable to the PC from your mobile
  • follow instruction step 8 in the preparation above
  • Download and install WriteDualIMEI
  • Enter your IMEI
  • Click START button
  • Pass, Restart your phone and done.

Tutorials Backup, Restore and Repair IMEI using Qpst Qualcomm tools

4) To turn off the DIAG connection

Open command at ADB Fastboot tools
adb shell
setprop sys.usb.config adb,mtp

Using Terminal emulator command

su
setprop sys.usb.config adb,mtp
Tutorials Backup, Restore and Repair IMEI using Qpst Qualcomm tools
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