[GUIDE] How to change IMEI on Snapdragon devices - GitHub Gist

A file is a sensitive system file found in the efs folder of Qualcomm-based Android devices. It stores critical network calibration data, including IMEI , MEID , and Baseband information. A QCN file editor tool allows technicians to modify this data, typically to restore an original IMEI after a firmware flash or to repair corrupted network security files. Primary Tools for QCN Editing

To edit and restore QCN files, you generally need a combination of specialized software:

: The standard tool for backing up and restoring QCN files to the device.

Launch QFIL and select the correct COM port for your device. Go to .

Click to choose a save location, then click Backup QCN . Wait for the "Backup QCN Succeed" message. Step 3: Installing and Using a QCN Editor Tool

Complete Guide to QCN File Editor Tool Installation and Usage

Before you can use any editor, you must enable on your device to allow the PC to communicate with the internal modem. Enable USB Debugging in Developer Options. Connect the device to your PC.

: A professional GSM tool used for broader Qualcomm repairs, including one-click QCN backup and restore. Step 1: Preparing Your Device