Every Qualcomm-based smartphone has a dedicated EFS (Encrypting File System) partition. This partition stores vital, device-specific information such as:
While IMEI QCN Tools are powerful utilities for data recovery and hardware repair, they carry significant technical risks and legal weight. They should strictly be used for restoring factory settings rather than altering device identities. Users are advised to always keep a personal backup of their device's EFS or QCN partition before attempting any flashing or modification procedures.
Safety Note: Always download these utilities from reputable developer forums (like XDA Developers) or trusted hosting platforms. Avoid unverified sites that package these tools inside executable .exe installers, as they frequently contain malware or adware. Step-by-Step Guide: Restoring Network and Repairing IMEI
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(sometimes called a QCN Editor or Rebuilder) is used on a PC to open a backup QCN file. If your original IMEI was lost, you would enter the original IMEI number
Choose the tool that best matches your needs and device:
Open a terminal and type: adb shell , followed by su , and then setprop sys.usb.config diag,adb . Step 2: Back up the Existing QCN Users are advised to always keep a personal
Download and install the official Qualcomm HS-USB QDLoader 9008 drivers on your Windows PC. Without these, your computer will not recognize your phone in diagnostic mode.
It seems you're looking for a for software called "IMEI Qcn Tool" (likely used for repairing IMEI numbers and restoring QCN partitions on Qualcomm Android devices).
Once you have downloaded the QPST tool and installed the necessary drivers, follow this guide to fix your IMEI and network issues. Step 1: Enable USB Debugging and Diagnostic Mode If your original IMEI was lost
: Save your device’s original network configuration.
It's important to note that QCN restoration is a solution for . If your device has suffered physical damage to the antenna, modem chip, or motherboard, QCN tools will not help.
There are several tools available for reading and writing QCN files. Below are the most reliable options used by professionals.
[GUIDE] How to change IMEI on Snapdragon devices - GitHub Gist 21 Oct 2025 —