|work|: Nvitems Reader Writer V10 Download Link
If the tool fails to write, the phone’s bootloader or EFS partition may be write-protected (locked).
Need further help? Check the QCN backup/restore guide linked in our bio. Have a legitimate use case? Join the XDA NVItems discussion thread for support.
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Most devices require a specific dialer code (like *#546368#* on some models) or ADB commands to enable the "Diag Port."