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.
The Tungtata QCN Tool is a lightweight, portable solution for Qualcomm network repairs. The "installation" is simply extracting the ZIP file and running the executable as an administrator. Success depends heavily on having the correct Qualcomm drivers and a valid QCN backup file. tungtata qcn toolzip install