Title: [Solution] SM-G920F NV Data / NVDATA Corrupted – Repair Guide & File Links Post Content: Hello colleagues,
If you are facing issues with "Invalid IMEI," "Baseband Unknown," or "NVDATA Corrupted" on the Samsung Galaxy S6 (SM-G920F) after a flash or update, you likely need to restore the NV data and certificate files.
Below is a brief guide and the resources needed to fix these network-related issues. 🛠 Tools Required: Z3X Samsung Tool Pro or Octoplus Samsung
Odin3 (for flashing stock firmware if the device is boot-looping) Root Access (Required for writing NV data or Cert files) 📂 Download Links: SM-G920F NV Data & Cert File: Download via MediaFire
Samsung SM-G920F Official Firmware: For restoration to stock before starting the repair. 📝 Step-by-Step Procedure:
Flash Stock Firmware: Use Odin to ensure the device is on a stable baseband version.
Root the Device: Use a compatible CF-Auto-Root or TWRP/Magisk method for Android 7.0.
Wipe EFS/NVDATA: Use your service tool (Z3X/Octoplus) to wipe the corrupted EFS or NVDATA partition.
Write NV Data: Select the SM-G920F model in your tool and write the NV data file from the link above. Repair IMEI/Write Cert:
If the IMEI is still 0049 or null, use the "Write Cert" function in Z3X.
Select a clean certificate file to restore the original network status.
Reboot & Verify: Check *#06# to confirm the IMEI is restored and test the network signal.
Note: Always backup your original EFS/NV partitions before writing new files to avoid permanent data loss.
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SM-G920F NV data file (Non-Volatile data) is a critical system file for the Samsung Galaxy S6. It contains unique device information required for network connectivity and hardware identification. What is NV Data?
NV data stores "Non-Volatile" parameters that persist even after a factory reset or firmware update. For the SM-G920F, this includes: IMEI Number
: Your device's unique identification for cellular networks. Baseband Information : Controls the modem and radio functions. Calibration Data : Settings for Wi-Fi, Bluetooth, and GPS sensors. Product Code & Serial Number : Regional and manufacturing identifiers. When do you need this file? You typically search for an NV data file (or an EFS backup
) if your device is experiencing the following issues after rooting or flashing custom ROMs: Unknown Baseband : The phone cannot "see" its own modem software. Null/Invalid IMEI
: The phone shows "IMEI: null" or a generic number (0049...), preventing calls and data. No Service : The device cannot register on any mobile carrier. Important Technical Warning NV data is device-specific.
Using an NV data file or EFS backup from a different SM-G920F unit can cause permanent issues, such as a mismatched IMEI or "Phone not allowed" errors on cellular networks.
If you are trying to repair your device, it is recommended to: Restore your own backup
: Always use a backup made from your specific device via TWRP or specialized Samsung repair tools (like Z3X or Octoplus). Flash Stock Firmware
: Sometimes reflashing the official 4-file (BL, AP, CP, CSC) firmware via Odin can re-initialize corrupted partition headers. Are you currently facing a "No Service" issue, or are you looking for a on how to back up these files?
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. sm-g920f nv data file
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.
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’s NV data file is barely 5–10 MB in size—a rounding error on a 32 GB phone. Yet its integrity determines whether the device lives as a fully functional communication tool or dies as a miniature tablet.
For the average user, this feature serves as a warning: back up your EFS today. For the technician, it’s a reminder that the most powerful tools (Odin, TWRP, root) come with the responsibility to safeguard the phone’s digital identity.
And for the G920F itself—now nearly a decade old—the NV data file remains its final, fragile link to the cellular world.
Have you recovered a G920F with a dead IMEI? Share your experience in the comments or our repair forum.
The "SM-G920F NV data file" refers to critical calibration and configuration data for the Samsung Galaxy S6 (International model). This data is stored in the NVRAM (Non-Volatile Random Access Memory), which contains unique device information like IMEI, serial numbers, and radio frequency (RF) parameters.
If your device is showing symptoms like "IMEI Null," "Baseband Unknown," or network connectivity issues after a bad flash or water damage, you likely have corrupted NV data. Understanding the NV Data File
What it does: It stores basic configuration and radio parameters that are not lost when the phone is powered off.
Why it's needed: Repairing "Security Damage" errors or "NV Data Write" failures often requires restoring this specific file. Title: [Solution] SM-G920F NV Data / NVDATA Corrupted
Common partitions: On the SM-G920F (Exynos chipset), this data is closely linked to the EFS and sec_efs partitions. How to Address NV Data Issues
If you are looking to repair or restore this data, here are the standard professional methods used in the mobile repair community: Tool/Method Z3X Samsung Tool Pro Professional Repair Used to write NV data and fix "Security Damage Error (1)". Octoplus Box Professional Repair
Commonly used for fixing "IMEI Null" and repairing networks on SM-G920F. Samsung Odin Firmware Flashing
Sometimes, flashing a full 4-file factory firmware can restore baseband if the hardware is intact. Recovery Mode Basic Troubleshooting
Can be used to "Wipe Cache Partition" if the phone is stuck restarting but doesn't have deep security damage. Next Steps for Repair
Searching for an "sm-g920f nv data file" is the digital equivalent of looking for a car key when you are locked out. The file itself is useless without the right tools (Odin, TWRP, Z3X) and the knowledge to apply it correctly.
To summarize:
.bin files from sketchy forums.If your baseband is still unknown after trying these steps, the issue may be hardware-related: a faulty pmIC (Power Management IC) or a blown antenna switch. In that case, no software NV Data file will save the device. However, for 90% of "Null IMEI" cases on the SM-G920F, a properly generated and restored NV Data file will bring your Samsung Galaxy S6 back from the dead.
Need further help? Leave a comment with your exact Odin error log or the output of getprop ro.boot. from ADB. Do not post your IMEI publicly.
In the context of the Samsung Galaxy S6 (SM-G920F) NV (Non-Volatile) data file
refers to critical configuration data stored in the device's permanent memory. Below is a technical summary regarding its function and the common repair procedures associated with it. Overview of SM-G920F NV Data
The NV data file is a critical component that stores hardware-specific calibration data and network parameters. In Samsung devices like the , this data is typically housed within the EFS (Encrypted File System) partition. Key Functions : Stores the device's unique IMEI number
, Baseband version, serial number, and network calibration settings. Storage Medium
: Unlike older models using eMMC, the Galaxy S6 series utilizes UFS 2.0 FBGA95 memory chips. Criticality
: Corruption or loss of NV data usually results in "IMEI Null," "Unknown Baseband," or "Not Registered on Network" errors. Common Technical Issues Security Damage Error (1)
: Often occurs during firmware flashes or root attempts, indicating a failure to write to the NV data partition. Corrupted IMEI (350000...)
: A generic IMEI value that appears when the original NV data is wiped or inaccessible. NV Data Write Error
: A specific failure log seen in professional repair tools (like ) when attempting to restore network functionality. Repair and Restoration Procedures
Technical recovery typically requires professional-grade service tools and specific firmware files: NV Data Write/Repair : Tools like are used to "Write NV Data" using backup files (often in formats) to restore original network certificates. Patch Certificate
: After repairing the IMEI or NV data, a "Patch Certificate" operation is often required to allow the device to register on cellular networks. Odin Flashing : For software-level corruption, technicians use
to flash the correct PDA and CSC versions, though this rarely fixes hardware-level NV data loss without a dedicated backup. Chip-Off Recovery
: In cases of severe hardware failure, the UFS chip is physically removed and read using a J-Tech or DediProg reader to extract raw partition data. Samsung Galaxy S6 G920F | Samsung Business Saudi Arabia Samsung Galaxy S6 G920F | Samsung Business Saudi Arabia. samsung.com
Samsung Galaxy S6 (SM-G920F) , the Non-Volatile (NV) data file is critical for maintaining network connectivity, as it contains calibration and security data like your baseband version The Samsung Galaxy S6 (model SM-G920F) had been
. If this data is corrupted, you will often see "IMEI Null" or "Baseband Unknown" in your device settings. Common Issues & Errors "Checking NV Data... Error"
: This frequently occurs during repair attempts with tools like Z3X Samsung Tool PRO
. It typically indicates that the security partition is damaged (Error 1). IMEI 35000000000009
: This generic IMEI is a sign of corrupted NV data or a wiped EFS partition. Known Solutions for Repair
Technicians generally use specialized service boxes to resolve these issues. Key steps from community guides include: Write NV Data from Backup
: If you have a previous backup, writing the NV file back to the device via is the most effective fix. Repair Network
: After flashing or writing new NV data, a "Repair Network" operation is usually required to restore signal. Stock Firmware Flash
: Flashing a complete 4-file (BL, AP, CP, CSC) stock ROM via
can sometimes restore a missing baseband by re-writing the modem (CP) file. Octoplus Solution
: Some users report fixing the "Reading NV data... error (1 138)" by using the "Read Code" function in Octoplus Box Recovery & Download Mode Access If you need to flash the device or wipe partitions: SAMSUNG G925F Hang On Logo Change Emmc - Facebook
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
The corruption typically occurs during aggressive software modifications:
Failed Flashing: Interruptions or using incorrect firmware for the G920F variant.
Security Lock Conflicts: Attempting to bypass FRP (Factory Reset Protection) or privacy locks can sometimes damage the NV data partition.
Baseband Corruption: If the EFS or SEC partitions are wiped, the phone loses its "identity," leaving the user with a device that is essentially a high-end paperweight. Recovery and Repair
Fixing NV data issues usually requires specialized repair tools and a "Full Firmware" package that includes specific security and network fix files:
Backup/Restore EFS: Professionals recommend backing up the EFS/NVdata partition before any flashing.
Repair Firmware: Using a "4-file" (BL, AP, CP, CSC) or "5-file" repair firmware can often re-initialize these partitions.
Specialized Tools: Services like the HalabTech Support or AZROM Repair Files provide specific DUMP, CERT, and NVdata files to manually restore the network configuration.
Are you currently facing a "No Service" error or an invalid IMEI after a software update?
CSC or CP from different models./efs on PC + cloud + external drive.Once you fix your SM-G920F, never suffer this again. Follow these golden rules:
| Do | Don't |
| :--- | :--- |
| Always back up EFS/NV via TWRP before flashing any custom ROM. | Flash random combination files from untrusted sources. |
| Use official Samsung firmware (from Frija/SamFirm). | Downgrade your bootloader (BL) version. |
| Keep a copy of your NV and EFS folder on an external drive. | Use "factory IMEI repair" apps from Play Store (they are fake). |
| If using custom kernels, ensure they support Exynos 7420 EFS protection. | Pull the battery during bootup or modem crashes. |
The SM-G920F uses a separate modem chip (Shannon 333). The NV data is stored in a dedicated partition called /factory or /nv_data. This partition is notoriously sensitive to: