Run the executable application. Note that because the utility is built on scripting platforms like AutoIT, it may require administrative execution permissions. Step 2: Load the Base QCN File
Modifying an IMEI number is illegal in many jurisdictions. If you are experiencing "Invalid IMEI" issues, it is safer to visit a professional service center or use verified official manufacturer tools.
When you flash a custom ROM, tweak system partitions, or suffer a software crash, the EFS partition (which houses the QCN data) can become corrupted. The Tungtata tool allows you to read, write, and repair this data to restore your phone's cellular capabilities. Core Features of the Tool
is a dedicated utility archive developed by the tech blogger Tungtata, designed to modify Qualcomm Calibration Network (QCN) files, manage network parameters, and repair IMEI numbers on Qualcomm-powered Android smartphones. When a mobile device suffers a corrupt baseband, invalid IMEI, or total loss of cellular signal following an aggressive firmware flash or EMMC replacement, this tool serves as a lightweight solution for technicians to restore the original factory configurations. Tungtata QCN Tool.zip
Extract the Tungtata QCN Tool.zip and run the .exe file as an Administrator. Step 3: Select the COM Port
It is typically used by technicians to "rebuild" or "repair" an IMEI when a device's software is corrupted, leading to "Null IMEI" or "Invalid IMEI" errors that prevent it from connecting to cellular networks. ⚠️ Critical Security Warning
If you have lost your mobile network signal, IMEI number, or baseband after flashing a custom ROM or resetting a Qualcomm-powered smartphone, you are likely looking for a solution. The is a specialized utility designed to fix these specific calibration and network issues. What is Tungtata QCN Tool? Run the executable application
Windows 10 or 11 (64-bit) is highly recommended.
Click on "Open File" and select your .qcn or .dat file.
Never write a new QCN file without backing up your current (even if broken) one first. If you are experiencing "Invalid IMEI" issues, it
If your Qualcomm-powered smartphone is experiencing network drops, "No Service" errors, or a null/blank IMEI after flashing a custom ROM or updating your firmware, you likely need to repair your phone's Non-Volatile (NV) RAM data. The is a specialized, lightweight Windows utility designed specifically to write, backup, and modify QCN (Qualcomm Calibration Network) files on Qualcomm Snapdragon devices.
Type su to grant root privileges (approve the prompt on your phone screen).