If stock firmware did not restore the baseband, you need to rebuild the NV data from scratch.
Required Tools:
Procedure:
After this, your baseband should return. The IMEI will show a generic number like 004999010640000. This is a test IMEI. You now need to restore your original IMEI using professional tools (see below).
By [Author Name]
It looks like any other file in the Samsung firmware archive—a modest .bin or .img file nestled among system partitions. But for technicians and advanced users working with the Samsung Galaxy S6 (SM-G920F) , the NV Data File is nothing less than the phone’s cryptographic soul.
Lose it, corrupt it, or flash the wrong version, and your G920F transforms from a flagship device into a Wi-Fi-only paperweight with “null IMEI” and a red warning about unknown baseband. sm-g920f nv data file
This feature explores what the NV Data file is, why the SM-G920F is particularly vulnerable to NV corruption, and how to protect, backup, and restore it.
Every phone has a unique IMEI number. An NV data file from another phone contains that other phone's IMEI. If stock firmware did not restore the baseband,