Tungtata has provided the community with a robust set of utilities—from SamFwTool for firmware downloading to MiFlash for bootloader management. As long as you follow the steps carefully and keep a backup of your original QCN file, you will have the power to restore your Qualcomm device to perfect working order every time.
Select or use extraction software like WinRAR or 7-Zip.
: A reliable USB data cable plugged directly into a motherboard port (avoid external USB hubs).
Open the extracted folder, find the .exe file, right-click it, and select Run as Administrator . tungtata qcn toolzip install
Reboot the smartphone. Your mobile network, baseband status, and network signals should now function correctly. Troubleshooting Common Errors Device Not Detected (COM Port Blank)
The phone's security partition (EFS) might be locked. You may need to wipe the EFS partition using a separate tool (like TWRP recovery or Fastboot commands) before writing a new QCN file.
: You can browse through the NV items listed in the tool. The primary IMEI is usually stored in NV item 550 (for SIM 1) and item 551 (for SIM 2), but this can vary by device. Tungtata has provided the community with a robust
Tungtata QCN Tool (Zip Installation & Usage Guide)
: Manually converting a 15-digit IMEI into its required hexadecimal structure can lead to severe structural errors. The tool automates this process cleanly.
Download the verified zip archive from a trusted mobile development repository. : A reliable USB data cable plugged directly
The tool should automatically detect your phone's COM port. If not, select the Diag port from the dropdown menu. Step 3: Load and Restore QCN File Click on the or "Write QCN" button in the tool. Locate your valid QCN file (formatted as .qcn ). Click "Open" to start the flashing process. Wait for the progress bar to complete. Step 4: Restart Device
Select the button to backup your existing (even if broken) QCN file.