Flash the modified QCN file back to the device using a tool like QFIL (Qualcomm Flash Image Loader) or UMT after enabling Diagnostic (DIAG) mode.
Leo found the archive: tungtata_qcn_tool.zip . It was a legend in the GSM community, a compact power-tool designed for one purpose: to rewrite the and restore the QCN files that give a phone its identity. tungtata qcn toolzip install