: Flashing a complete 4-file (BL, AP, CP, CSC) stock ROM via
The SM-G920F NV data file is specific to the Samsung Galaxy S6 (SM-G920F) and contains configuration data that's used by the device. This file may include information such as:
NV data stores "Non-Volatile" parameters that persist even after a factory reset or firmware update. For the SM-G920F, this includes: IMEI Number
: If a backup is unavailable, some technicians attempt to "rebuild" the file by manually editing the .nv_data file or flashing a "good" copy from an identical device, though this carries high risk.
dd if=/sdcard/efs_backup.img of=/dev/block/platform/15570000.ufs/by-name/EFS