Changing or altering a device’s IMEI to a number other than the one originally assigned by the manufacturer is illegal in many jurisdictions worldwide. This tool should only be used to restore original network configurations and legally owned IMEIs lost during software development or flashing accidents.

To understand the purpose of this tool, it's crucial to first understand what a is. QCN stands for Qualcomm Configuration Name. It is a highly specialized data file found in all devices powered by Qualcomm processors. This file acts as the "DNA" of your smartphone's cellular hardware .

Have you already successfully enabled on your device?

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Works across various smartphone brands utilizing Snapdragon processors, including Xiaomi, Oppo, Vivo, Realme, OnePlus, and Samsung. Prerequisites Before Using the Tool

Select the active COM port assigned to your phone, browse for your .qcn file, and click Restore or Write . Download and Safety

Ensure your diagnostic port is connected and selected in the tool.

If you’ve ever encountered a "No Service," "Invalid IMEI," or "Emergency Calls Only" error after flashing a custom ROM or updating your Android firmware, you likely need to repair your device’s data. One of the most effective utilities for this task is the Tungtata QCN Tool .

Click or Generate . This will create a modified QCN file customized for your specific hardware.

Double-check that the QCN file you used is an exact match for your phone's model number and regional variant. Using a file from a different variant can permanently brick your radio frequencies.

The executable runs directly out of the extracted zip archive.

Follow these steps carefully to restore your device's network capability. Step 1: Download and Extract the Tool

The software comes compressed in a .zip archive and executes directly without requiring a complex installation process.

Compatible with a wide variety of Snapdragon-powered devices from brands like Xiaomi, OnePlus, Vivo, Oppo, and Realme.

When something goes wrong with this data, your phone can lose its ability to connect to a cellular network, leading to symptoms like "No Service," "Unknown Baseband," or missing IMEI numbers (often displayed as "0000"). In such cases, restoring a previously backed-up QCN file is often the only solution to bring the phone back to life.

Disconnect your phone from the computer and restart it. Once booted, open your dialer and type *#06# to verify that your original IMEI numbers have been successfully restored. Insert your SIM card to confirm that your mobile signal, 4G/5G data, and SMS capabilities are fully operational. Important Safety and Legal Warning

Easily backup your healthy QCN file before experimenting with new firmware.

No, this tool is specifically designed for Qualcomm chipsets. MediaTek devices use a different software protocol and file format.