Accessing NV data on the G925T requires either or Root Access .

Downloading a generic “G925T NV data file” from a random forum is risky because:

Need to fix an IMEI zero, null baseband, or network issue on your Galaxy S6 Edge (SM-G925T)? Download the correct NV Data file, learn safe writing methods via Octoplus, Z3X, or UFI, and restore your device’s EFS partition.