To help you get the exact files or steps you need next, please let me know:
Use your service box to select . This modifies the modem firmware to accept the existing NV structure.
If you experience any of these after flashing firmware or trying to root, your NV Data file is almost certainly corrupt or missing.
[Solution] SM-G920F NV Data / NVDATA Corrupted – Repair Guide & File Links Post Content: Hello colleagues,
The NV data represents a set of partitions on the phone's storage containing the essential information for the device to operate on a cellular network. For the Galaxy S6 (SM-G920F), this includes: The unique identifier for your device. sm-g920f nv data file
Can be used to "Wipe Cache Partition" if the phone is stuck restarting but doesn't have deep security damage.
Commonly used for fixing "IMEI Null" and repairing networks on SM-G920F. Firmware Flashing
: If the NV data or EFS partition is corrupted, the phone may show a "Null" or "Unknown" baseband/IMEI, leading to a complete loss of cellular network connectivity.
If you are facing issues with "Invalid IMEI," "Baseband Unknown," or "NVDATA Corrupted" on the after a flash or update, you likely need to restore the NV data and certificate files. To help you get the exact files or
Alternatively, flash a clean, official 4-file (Binary) stock firmware via Odin to ensure the modem, bootloader, and system files are perfectly synchronized. Essential Preventive Measures
If you don't have a backup, all is not lost, but the process is more involved.
Radio frequency (RF) calibration parameters required to connect to 2G, 3G, and 4G LTE networks.
Navigate to the tab on the left side of Odin and check Re-Partition . [Solution] SM-G920F NV Data / NVDATA Corrupted –
If the phone can boot but has no service, a "Patch Certificate" procedure is often required after restoring the NV file to fix the network. Summary of Symptoms "NV data is corrupted" error NV file corrupted IMEI null/null EFS/NV file missing/corrupted No SIM/No Service Invalid NV settings Bootloop on Samsung Logo Major NV system partition damage
A transparent black box with yellow text appears on your home screen. Why Does This Happen? On the SM-G920F, NV data issues usually stem from:
| Model | Chipset | Baseband | Typical NV structure | |--------|---------|----------|----------------------| | SM-G920F | Exynos 7420 | Shannon 333 | EFS v2, NV items 0–9000+ |
Check *#06# to confirm the IMEI is restored and test the network signal.