What it is
Key uses
Practical tips (safe, effective use)
Verify authenticity & scan downloads
Match device chipset and QCN format
IMEI ↔ HEX conversions
Maintain parity and checksums
EFS ownership / permissions
Use safe restore methods
Legal & ethical caution
If network fails after restore
Troubleshooting steps
Quick workflow example
Resources to consult (general)
If you want, I can:
Tungtata QCN Tool is a lightweight, free utility designed for modifying Qualcomm Configuration Network (QCN) files to repair or update IMEI numbers on Qualcomm-based Android devices. Developed as a portable AutoIT application, it supports dual-SIM editing and includes integrated IMEI-to-HEX conversion for technician use. Detailed information and download links are available at Tungtata Blog. QCN tool - Simply QCN edit, IMEI <-> HEX converter
The Tungtata QCN Tool is a specialized utility designed for Qualcomm-based Android devices to edit QCN (Qualcomm Calibration Network) files. It is primarily used to repair or change IMEI numbers by converting them to HEX format and modifying the backup file before restoring it to the device. Prerequisites
A Backup QCN File: You must have a backup of your device's original QCN file, typically created using tools like Qualcomm Product Support Tools (QPST) or QFIL.
USB Debugging & Root: Most procedures require the device to be rooted and have USB debugging enabled to communicate with the PC.
Diagnostic Mode: Your phone must be in "Diag Mode" (usually enabled via secret dialer codes like *#*#717717#*#* or ADB commands) so the PC can recognize the COM port. Step-by-Step Guide to Using Tungtata QCN Tool
Download and Extract: Obtain the Tungtata QCN Tool.zip from a trusted source like Tungtata's Blog or Google Drive. Use the password tungtata.net if prompted. Load the QCN File: Open the tool and click Load QCN. Browse and select the backup .qcn file you created earlier. Modify the IMEI: The tool will display the current IMEI stored in the file. tungtata qcn toolzip
Enter your target IMEI (ensure you are using your device's legal, original IMEI) into the text field.
If your device is dual-sim, enter the second IMEI in the corresponding field. Replace and Export:
Click Replace or Convert to apply the changes within the tool.
Select Export QCN to save a new, modified version of your backup file. Restore the Modified File: Open your flashing utility (like QFIL or QPST). Navigate to Tools > QCN Backup Restore. Browse for your modified QCN file and click Restore QCN.
Finalize: Restart your device once the process finishes and dial *#06# to verify the changes. Important Notes
IMEI Legality: Changing an IMEI to a number other than the one originally assigned to the device is illegal in many jurisdictions. This tool should only be used for legitimate repair purposes.
EFS Partition: In some cases, you must reset the device's EFS partition (via TWRP or specialized commands) before the modified QCN will take effect. Are you currently trying to fix a "No Service" issue or AI responses may include mistakes. Learn more 🟢 Tungtata QCN Tool.zip - Google Drive 🟢 Tungtata QCN Tool. zip - Google Drive. Google Drive QCN tool - Simply QCN edit, IMEI <-> HEX converter
In the world of Android smartphone repair and modding, few things are as dreaded as "Null IMEI" or "Unknown Baseband." These errors render a device unable to make calls, send texts, or connect to mobile data, essentially turning a smartphone into a pocket-sized WiFi tablet.
For users of specific Nokia models—most notably the Nokia 5.1 Plus (and some variants of the Nokia 3.1 Plus and 6.1 Plus)—the Tungtata QCN Tool has become a lifesaver. This specialized utility is designed to repair corrupted QCN (Qualcomm Calibration Network) files, restoring the device's network connectivity.
This guide provides an in-depth look at the Tungtata QCN Tool, how it works, and why it is essential for technicians and DIY repair enthusiasts. What it is
The Tungtata QCN Tool stands out because it is tailored for the specific security architecture of Nokia phones. Here are its standout features:
The Tungtata QCN Tool is a small, portable Windows-based application created by a developer known as "Tungtata." Its primary purpose is to rebuild or restore the QCN file on Qualcomm-powered Android devices.
1. Prepare the Device You need to put your Qualcomm device into Diagnostic Mode.
2. Launch the Tool
3. Configure Settings
4. Write the QCN
5. Reboot
Often, when the baseband crashes, the WiFi and Bluetooth MAC addresses also disappear (showing as 02:00:00:00:00:00). This tool helps regenerate or write the correct MAC addresses, restoring WiFi and Bluetooth functionality.
The Nokia 5.1 Plus (codenamed Panda_sprout) is notorious for losing its IMEI after a factory reset or an OTA update failure. This happens because the modemst1 and modemst2 partitions (where QCN data lives) can become corrupted.
Standard Qualcomm tools like QPST (Qualcomm Product Support Tools) or QFIL can restore QCNs, but Nokia devices often have an extra layer of encryption or "signing" on their modem partitions. If you try to write a QCN from another phone using standard tools, the Nokia security system will reject it. Key uses
The Tungtata QCN Tool acts as a bridge. It formats the corrupted partitions and writes a compatible "base" QCN, allowing the phone to boot up with a network signal again. Note: In many regions, writing a generic QCN changes the SIM status to "Emergency Calls Only" until the correct IMEI is written back via the dialer or engineering mode.