You must enable "Diagnostic Mode" on your phone. This is usually done via a secret code (e.g., *#*#717717#*#* ) or through ADB commands.
Select the correct COM port corresponding to your device. nvitems reader writer v10 download link
Most devices require a specific dialer code (like *#546368#* on some models) or ADB commands to enable the "Diag Port." You must enable "Diagnostic Mode" on your phone
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: Run NVItems Reader Writer.exe as an Administrator.