How to Backup or Restore QCN/EFS on Qualcomm devices

There are lots of time when you unexpectedly lose your device important details. These important details include IMEI numbers, wifi address gets null or Bluetooth goes null. In this situation, you have no choice but either copy such details from a new device or to restore these details from a nandroid backup.

However, there’s an easy way to fix it as well. You can use the QCN/EFS files on your Qualcomm device to fix such problems. Today in this article, we will help you to backup and restore your device QCN/EFS files. So keep reading this article to the last.

How to Backup or Restore QCN/EFS on Qualcomm devices

What are QCN/EFS on Qualcomm devices

QCN and EFS files contain cellphone manufacturer utility program which is used to edit many features of a modern smartphone. These files are hidden deep inside a phone firmware and are pretty hard to access or update them. However, these files hold special information such as IMEI numbers, wifi address and Bluetooth address keys. So in case you need to restore your device from any invalid or null IMEI problems, then you need to back up these files.

How to Backup or Restore QCN/EFS on Qualcomm devices

You can backup or restore QCN/EFS on Qualcomm devices with the help of QPST tool. You can download this tool from the download box given below:

Filename QPST_2.7.472.4.7z
File type 7z zip file archive
Last updated Jan 28
Download Server 1

Steps to Backup QCN/EFS on Qualcomm devices

Download the QPST package and run “QFIL.exe” file.

Advertisements

Make sure that the program is in “Lenovo HS-USB Diagnostics” mode.

In the top menu of the program, navigate to “QFIL” select “Tools” >> “QCN Backup Restore”

A new window will open. Click on “Backup QCN” and wait for the end of the backup process. It will show the following process:

Start Download QCN
COM Port number:7
Checking if phone is connected...
Is PhoneConnected: Passed. Phone is connected
Sent SPC code to the phone successfully
Downloading QCN file : C:\temp\00000000.qcn
Done downloading the qcn file: C:\temp\00000000.qcn
Finish Backup QCN

Note: By default, the backup QCN file with the name of “00000000.qcn” will be saved to “C: \ temp \”. You can further access this file if you want to.

Steps to Restore QCN/EFS on Qualcomm devices

Download the QPST package and run “QFIL.exe” file.

Make sure that the program is in “Lenovo HS-USB Diagnostics” mode.

In the top menu of the program, navigate to “QFIL” select “Tools” >> “QCN Backup Restore”

A new window will open. Click on the “Browse” button and locate file “00000000.qcn” and click “Open.” Then click on “Restore QCN” and wait for the restore process. The process log will look something like this:

Process Index:0
Start Restore QCN
COM Port number:7
Uploading QCN file : C:\temp\00000000.qcn
Checking if phone is connected...
Done uploading the QCN file: C:\temp\00000000.qcn
Finish Restore QCN

After this, you can restart your Qualcomm device and check whether the details have been restored or not. If not, then try the process again.

Handpicked by our Editors:

Advertisement

So this is how you can backup and restore the QCN/EFS on Qualcomm devices. Make sure to keep these files secure as these contain confidential data such as IMEI numbers which can easily be used for bad purposes. If you’re facing any problem in this tutorial then feel free to comment down below.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.