If the IMEI is still 0049 or null, use the "Write Cert" function in Z3X.

If you’re troubleshooting an SM-G920F and see any of the following, suspect NV damage:

A corrupted NV Data file on the SM-G920F is terrifying—a phone that cannot make calls is essentially a brick. However, it is rarely a hardware failure. With the correct , a backup from a donor device, and the proper tools (free TWRP/ADB or paid Chimera/Z3X), you can restore network functionality.

Many free NV files online contain malware. Never run executable files from unknown sources. Only download .bin or .tar files containing the NV partition.