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If you need to move forward with the repair process, tell me: What is the exact of your smartphone? Which Android version or custom ROM is currently installed?
Restores signal stability by writing valid calibration data back to the device's internal memory (specifically the EFS folder).
Download the Qualcomm Product Support Tool (QPST) suite. You will need the "Software Download" application within this suite to write the final QCN file to the device. Step-by-Step Guide to Using Tungtata QCN Tool Tungtata QCN Tool.zip
file, which contains critical network configuration data (3G/4G/5G settings). IMEI Repair
Open Windows . Under the Ports (COM & LPT) section, you should see Qualcomm HS-USB Android DIAG 901D (COMxx) . Note down the specific COM port number. Step 3: Run the Tungtata QCN Tool
Open your phone dialer and enter *#*#717717#*#* or *#*#13491#*#* . This public link is valid for 7 days
When these parameters get corrupted during a bad firmware flash, the phone loses its ability to connect to cellular towers. The Tungtata tool allows you to rewrite a healthy QCN file back to the device to fix these issues. Key Features of the Tool
Download the Tungtata QCN Tool.zip and extract it to your PC.
The "Tungtata QCN Tool" is, therefore, part of a legacy of community-developed software aimed at giving users more control over their devices. It is targeted at users who require capabilities beyond what official manufacturer tools offer. Can’t copy the link right now
is a utility designed for mobile technicians to manage QCN (Qualcomm Calibration Network) files on Android devices with Qualcomm chipsets. These files contain critical network and security data, including IMEI and baseband information.
Changing an IMEI number to match a different device is illegal in many countries. This tool must only be used to restore the original, legally assigned IMEI that belongs to your specific hardware.