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SM-G920F NV (Non-Volatile) Data File is a critical, low-level partition on the Samsung Galaxy S6 (SM-G920F) that stores unique, persistent cellular and hardware calibration settings. Unlike user data (photos, apps), NV data is vital for network connectivity and device functionality, persisting even after factory resets. Functionality:
It contains parameters for IMEI, MAC addresses (WiFi/Bluetooth), network bands, signal calibration, and radio settings. NV Data Corruption: If this file is corrupted, the device often displays a "NV data is corrupted" "Security damaged"
error, resulting in no signal (null/null IMEI) or failure to boot. Fixing Method:
Repairing this file often requires flashing a new modem, fixing EFS, or using specialized tools like Z3X Box to write a fresh, healthy NV file. Core Components of the NV File
The NV file is closely related to, but distinct from, the EFS partition. While EFS holds the IMEI and basic radio settings, the NV data file holds more comprehensive calibration details. IMEI & Network Identity:
Defines how the phone identifies itself on cellular networks. Radio Calibration: Parameters for operating on 2G, 3G, and LTE frequencies. MAC Addresses: Bluetooth and WiFi addresses. What Causes Corruption? Improper Flashing:
Flashing firmware that does not match the regional firmware of the device. IMEI Repair/Patching:
Mismanaged attempts to change the IMEI or patch certificates (often using or similar tools) can corrupt the NV data. Rooting/Modding:
Incorrect rooting procedures that accidentally wipe the EFS or NV partitions. Hardware Failure: Underlying eMMC memory corruption. Repairing and Restoring SM-G920F NV Data
When the NV data is corrupted (or a "Security damaged (1)" error appears), the following steps are generally taken by technicians to restore it: Flash Stock Firmware: First, use
to flash the latest official stock firmware for the SM-G920F to ensure the system binaries are correct. Restore EFS/NV via Box/Dongle: Using a tool like Chimera Tool
, select the correct model (SM-G920F) and choose the "Write NV" or "Repair" function, loading a pre-read, working NV image file. Patch Certificate:
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 sm-g920f nv data file
Disclaimer: Repairing NV data is a high-level repair. Improperly flashing NV files can permanently damage the cellular radio capability of the device. + Repair IMEI + Patch Certificate SM-A105FN - Facebook
The file size was exactly 32,768 bytes. Just a scrap of binary code in the grand scheme of the internet, yet in the dimly lit back-alley repair shop in Taipei, it was worth more than its weight in gold.
The shop owner, a man known only as "Jinx," stared at the hexadecimal editor on his monitor. The text on the screen glowed a dull green.
SM-G920F_NV_DATA.bin
To the uninitiated, the filename meant nothing. To Jinx, it was the fingerprint of a ghost.
The Samsung Galaxy S6 (model SM-G920F) had been a revolutionary device in its time—glass and metal, a sleek predator of 2015. But this specific unit, the one sitting dead on the anti-static mat in front of him, was a liability.
An hour ago, a nervous kid in a hoodie had dropped it off. The screen was shattered, but that wasn’t the problem. The phone wouldn’t even boot past the Samsung logo. It didn't have a "Network Locked" message; it simply had no IMEI. The baseband was unknown. It was, for all cellular purposes, a brick.
"My life is on there," the kid had whispered, his hands shaking. "I don't care about the contacts. I need the second factor. The authenticator. If I don't get in, they're going to know I took it."
Jinx hadn’t asked who "they" were. In this business, ignorance was a survival trait. But he knew the diagnosis immediately: Corrupted NV Data.
The NV (Non-Volatile) data file is the soul of a phone. It contains the calibration data for the radio, the MAC addresses for Wi-Fi and Bluetooth, and most importantly, the IMEI—the phone’s social security number. When that file gets corrupted, the phone loses its identity. It ceases to exist to the cell towers.
Jinx cracked his knuckles. This wasn't a hardware fix. No amount of soldering or heat-gunning would bring back data that had dissolved into digital noise. He needed a transplant. He needed a donor.
He spun his chair around to the wall of "The Morgue"—a shelving unit lined with hundreds of motherboards, their green circuits exposed like dissected frogs. He needed a backup, a clean NV file for an SM-G920F. SM-G920F NV (Non-Volatile) Data File is a critical,
Technically, he could just write a generic certificate. The internet was full of "Universal S6 NV Files." But Jinx was an artist. A generic file would throw a security mismatch flag if the phone’s bootloader was newer than Android 6.0. And the original security software was Samsung Knox—merciless. If the security triangle didn't match, the phone would self-destruct in a boot loop.
He scrolled through a private server he maintained, a graveyard of backups from devices long since recycled.
SM-G920F_Stock_Backup_01.bin — Error: Checksum mismatch.G920F_Cert_Pack.tar — Risky. High chance of null IMEI.Then he saw it. An old file, dated three years ago. It had been pulled from a "write-off" unit—a phone that had been crushed but whose logic board had survived.
Jinx loaded his JTAG box. The interface was archaic, a relic of the Android 5.0 era, but it spoke the language the phone needed to hear.
"
The SM-G920F NV data file is a critical system file for the Samsung Galaxy S6 (International model) that stores non-volatile random-access memory (NVRAM) information. This data contains unique device hardware information, including your IMEI number, serial numbers, and radio frequency (RF) calibration parameters. Why You Need This File
Users typically search for this file when encountering cellular connectivity issues such as:
Invalid IMEI / IMEI 0000: Often caused by a corrupted EFS partition or failed software flashing.
"Not Registered on Network": The device cannot authenticate with your carrier due to missing security certificates.
Baseband Unknown: The modem firmware cannot be read because the NV data is corrupted. Tools for Handling NV Data
Managing these files generally requires professional "box" software or specialized mobile repair tools:
Z3X Samsung Tool Pro: Widely used for reading and writing NV data, repairing IMEI, and "patching certificates" to restore network signal. The Samsung Galaxy S6 (model SM-G920F) had been
Octoplus / Octopus Box: Another common tool used to fix "Reading NV data... error" and restore network function.
Chimera Tool: Used for advanced Samsung repairs, including modem and NV data restoration. Troubleshooting Connectivity (Without Files)
If you are facing "No Data" or network issues, try these official troubleshooting steps before attempting to flash NV files: samsung s6 g920f imei repair with Z3X U1-U2-U3-U4-U5-U6
11 Sept 2020 — Root : https://www.mediafire.com/file/38w5pj4kb9f5eok/G920F_7.0.md5.tar/file NVDATA and Cert YouTube·Alraed-Tech⚜الرائد-تك
NV data backup and recovery method based on high-pass platform
NV (Non-Volatile) data resides in the EFS (Encrypted File System) partition of the phone’s chipset—typically the Shannon 333 modem on the Exynos 7420 platform. Unlike user data or system apps, NV data stores permanently assigned hardware identifiers and calibration parameters, including:
Think of NV data as the phone’s DNA. Without it, the device cannot authenticate with mobile networks, secure Bluetooth pairing fails, and even Samsung’s own diagnostics reject the hardware.
The SM-G920F is the model number for the Samsung Galaxy S6 (international Exynos variant). “NV data” (non-volatile data) refers to device-specific calibration, configuration, and network-related parameters stored in persistent flash (often called NV, EFS, or NVRAM depending on device/firmware). The NV data file for SM-G920F typically contains IMEI/serial info, radio calibration (baseband), Wi‑Fi/Bluetooth MACs, network provisioning, and other hardware/configuration keys essential for proper cellular and wireless operation.
Searching for and using a pre-made "NV data file" for the Samsung Galaxy S6 (SM-G920F) is generally considered a high-risk operation. While it is a powerful tool for repairing specific software issues, downloading a random file from the internet and flashing it to your device usually leads to a hard bricked phone or a lost IMEI.
Stay on the right side of the law. Your NV repair should only aim to recover your phone’s original identity.
If your G920F is still working normally, stop reading and back up your NV data immediately. Here’s how:
KG STATUS says "Checking" or "Prenormal." If it does, you have a Samsung Reactivation Lock – fix this first via your Samsung account.