The SM-G920F (Samsung Galaxy S6) NV data file is a critical partition containing the device's Non-Volatile information, such as IMEI, baseband, and network calibration data. When this file is corrupted or missing—often after a bad firmware flash—it leads to the "long story" of a phone that won't connect to a network or shows "IMEI Unknown". Why NV Data Fails
Technicians generally use specialized service boxes to resolve these issues. Key steps from community guides include: Write NV Data from Backup sm-g920f nv data file
“You dropped it, probably. Or a sudden power loss during a firmware update. The file is fragile. One wrong bit, and the phone forgets how to talk to cell towers. It’s amnesia for the radio.” He sighed. “Officially? Samsung says the mainboard is trash. Replace it.” The SM-G920F (Samsung Galaxy S6) NV data file
Process with box:
Then pull the file via adb pull /sdcard/efs_backup.img. Key steps from community guides include: Write NV
The NV data file (Non-Volatile data) for the Samsung Galaxy S6 ( Go to product viewer dialog for this item.