The phone's NV items might be write-protected. You may need to temporarily wipe the EFS partitions ( modemst1 , modemst2 , and fsg ) using an EDL (Emergency Download) tool before restoring the QCN file.

:

: Connect your Nokia 8000 4G to your computer and install the necessary USB drivers.

Common tools for this Qualcomm-based device (Snapdragon 210) include QFIL (Qualcomm Flash Image Loader) or ChimeraTool . Step 2: Enable Diagnostics (DIAG) Mode

While less common on modern Qualcomm KaiOS devices, you can attempt to access diagnostic menus via secret codes. Standard Nokia codes include: