: Integrates a converter that translates standard decimal IMEI numbers into Hexadecimal format, a required step for manual editing in hex editors.
: Sometimes used to adapt a device's network configuration for different carrier bands. Tool Details Standard Password tungtata.net (typically required to extract the .zip file)
Wait for the progress bar to reach 100%. The tool will display a "Success" message. Step 5: Reboot and Verify
Click the "Rebuild" button to generate a new, corrected QCN file. Tungtata QCN Tool.zip
Download and extract to a secure directory on your desktop using a local file utility.
Never flash a QCN file intended for a different phone model. For example, flashing a Redmi Note 10 QCN file onto a Redmi Note 10 Pro can permanently corrupt the physical RF components.
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. : Integrates a converter that translates standard decimal
If the QCN partition on a phone becomes corrupted (often displaying "NULL IMEI" or "Baseband Unknown"), the device will be unable to register on a cellular network. The Tungtata QCN Tool facilitates the writing of a valid QCN backup back into the device’s EFS (Encrypting File System) partition.
The tool simplifies several technical tasks related to device identity and signal calibration: QCN Editing : Open and modify
: The tool is released as a small executable (often under 1MB) that does not require extensive installation. How the Tool is Used in Repairs The tool will display a "Success" message
Note: This guide is for educational purposes. Tampering with EFS partitions carries a risk of permanent data loss or bricking the device.
You must enable Diagnostic Mode on your phone (usually via ADB command setprop sys.usb.config diag,adb or a dialer code) so the computer can communicate with the modem.
Your Android device must be rooted (usually via Magus or KernelSU) to open the necessary communication ports.