Provides the capability to edit and rewrite the original IMEI numbers back into the QCN file structure to match the device’s physical chassis sticker.
What specific or phone symptom are you currently dealing with?
Your computer cannot interact with the QCN partition unless the phone is in Diagnostic Mode. Connect your phone to the PC using a USB cable. Open a command prompt on your PC inside your ADB folder. Run the following commands: adb shell su setprop sys.usb.config diag,adb Use code with caution.
Qualcomm Calibration Network (QCN) files contain critical device-specific data. This data controls how your smartphone interacts with cellular networks. Key Components of a QCN File
The tool is distributed as a small ZIP archive, making it portable and easy to use without a heavy installation process. How to Use Tungtata QCN Tool Tungtata QCN Tool.zip
Click the or Open button within the tool. Select the correct, model-specific .qcn file that matches your precise phone model and variant. Step 5: Write the Data
If you'd like to proceed with repairing your device, let me know: What is the exact of your phone?
Always use custom recoveries like TWRP to back up the EFS partitions ( efs , modemst1 , modemst2 ) before rewriting data. Step-by-Step IMEI & Network Repair Process
Even if your network is broken, try to take a backup of your current EFS/QCN layout. A corrupted backup is better than no backup at all if you need to revert changes. Provides the capability to edit and rewrite the
Go to your phone's and tap Build Number 7 times to unlock Developer Options. Navigate to Developer Options and enable USB Debugging . 3. Enable Qualcomm Diagnostic Mode (Diag Port)
Technicians using this tool generally follow these steps (at their own risk):
Mismanaging QCN data can permanently "brick" a device. Writing the wrong QCN file to a phone can irreparably damage the modem's NVRAM, rendering the device permanently incapable of making calls or connecting to mobile data.
Ensure Diagnostic Mode is actually active. Check Windows Device Manager for yellow exclamation marks. If present, reinstall the Qualcomm USB drivers and restart your computer. Write Operations Failing / Access Denied Connect your phone to the PC using a USB cable
The world of Qualcomm device repair has several well-known and trusted tools. If you cannot find or are wary of the specific Tungtata tool, these alternatives offer the same core functionality:
The phone's security partitions (EFS) are blocking the write operation.
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Install the official Qualcomm HS-USB QDLoader 9008 and Diagnostic drivers on your PC. Without these, the tool cannot detect your phone.
Once the tool displays a "Success" or "Finished" message, disconnect your phone. Reboot the device. Dial *#06# to verify that your IMEI numbers have returned, and check your SIM card signal strength. Troubleshooting Common Errors Device Not Detected / COM Port Blank
