The Samsung Galaxy S6 is nearly a decade old (released 2015). Its eMMC storage is prone to degradation. To prevent NV data loss:
Would you like a step-by-step for any specific method, such as manual hex editing of nv_data.bin or using Odin to flash EFS only?
The NV data file (Non-Volatile data) for the Samsung Galaxy S6 ( Go to product viewer dialog for this item.
) contains critical phone-specific information like the IMEI, serial number, and network calibration settings. If this file is corrupted, you will often see "No Service," a "null" IMEI, or "Baseband Unknown". 🛠️ Common Tools Required
Repairing or restoring NV data usually requires professional service tools because these partitions are protected:
Z3X Samsung Tool Pro: The industry standard for Samsung IMEI and NV repair.
Octoplus Samsung Tool: Often used to fix "Reading NV data... error".
Odin3: Used for flashing stock firmware or combination files.
Root Access: Necessary for most tools to write to the NV/EFS partitions. 📝 Repair Procedures 1. Fix "Security Damaged" or "NV Data Error"
If your device shows a security error during boot or within a service tool: sm-g920f nv data file
Flash Combination Firmware: Use Odin to flash a "Combination File" matching your phone's binary version (U1-U6).
Wipe EFS/NV: Use Z3X or Octoplus to reset the EFS partition. Write NV Data/Cert:
Write a clean NV data file or "Cert" file specifically for the to restore signal. 2. Restore "Null" IMEI
Check Baseband: Dial *#1234#. If the baseband is "Unknown," flash the stock modem or full firmware first.
Write QCN/NVRAM: If you have a backup, restore it via professional tools. If not, you may need a "DUMP" file from a working device. 3. Firmware Flashing (Standard Fix) Sometimes a simple software refresh can re-initialize data:
Download: Get the official firmware from SamMobile or SamFw. Flash: Use the AP, BL, CP, and CSC slots in Odin.
Note: Use CSC (not Home_CSC) to perform a clean wipe if the system is heavily corrupted. ⚠️ Critical Warnings
Backup First: Always try to back up your existing EFS and NV partitions before attempting repairs, even if they seem broken.
Binary Match: Ensure any file you download matches your device's Binary Level (e.g., if your phone is Binary 6, you cannot flash Binary 5). SM-G920F NV Data File: The Complete Guide to
Legal Note: Changing an IMEI number is illegal in many jurisdictions. These guides should only be used to restore original factory settings. If you(Dial *#06#) What error message are you seeing exactly? Do you have access to a service box like Z3X or Octoplus?
How to fix corrupted modem and imei after full dump flash? - Facebook
The "sm-g920f nv data file" refers to the Non-Volatile (NV) RAM data stored on the Samsung Galaxy S6 (SM-G920F) Go to product viewer dialog for this item.
. This file system is a critical component that stores device-specific configuration and radio frequency (RF) parameters. Understanding the NV Data File
Function: The NV data acts as a persistent memory for the phone's basic hardware settings. It ensures that essential information is not lost when the device is powered off.
Core Information: It typically contains the device's unique IMEI number, serial numbers, and baseband configuration details.
Location: On Samsung devices, these parameters are often housed within the EFS (Encrypted File System) partition. Common Issues & Recovery
Damage to the NV data file is a frequent cause of severe software issues for the
Corruption Symptoms: 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. Never force reboot (hold power) while the modem is active
"Security Damage" Error: Users often encounter errors like "Reading NV data... error (1 138)" or "Security Damage Error (1)" when attempting to repair the device with professional service tools. Repair Methods:
Backup & Restore: It is standard practice to back up the NV data using tools like QPST or EFS Professional before flashing custom ROMs.
Manual Rebuilding: 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.
Professional Tools: Software like Z3X, Octopus Box, or Chimera are frequently used to write new NV data or repair the IMEI after corruption. Critical Warning
Flashing or modifying NV data partitions can permanently destabilize your phone and void your warranty. Because these files contain unique identifiers, simply copying an NV data file from another phone may not fully restore your original device identity and can lead to legal or network blacklist issues. samsung s6 g920f imei repair with Z3X U1-U2-U3-U4-U5-U6
Root : https://www.mediafire.com/file/38w5pj4kb9f5eok/G920F_7.0.md5.tar/file NVDATA and Cert YouTube·Alraed-Tech⚜الرائد-تك need help for nv rebuild - Samsung Community
efs1.emmc.win and efs2.emmc.win files to your PC./efs/ (root required):/efs/nv_data.bin # main NV binary
/efs/nv_data.bin.md5 # integrity check
/efs/imei/ # IMEI backup
/efs/bluetooth/ # BT MAC
/efs/wifi/ # WiFi MAC
/efs/factory.prop # factory mode flags
/efs/cryptoprop # encryption related
Repair IMEI tools (e.g., Chimera, Octoplus)su
dd if=/dev/block/platform/155a0000.ufs/by-name/EFS of=/sdcard/efs.img
How do you know if you need an NV data file? Look for these specific symptoms:
| Symptom | What you see on the screen |
| :--- | :--- |
| Null IMEI | Dial *#06#. It shows "Null" or "Blank" instead of a 15-digit number. |
| Unknown Baseband | Go to Settings > About Phone > Status. Baseband version shows "Unknown." |
| No Signal / Emergency Calls Only | The signal icon shows an empty triangle or a circle with a line. |
| Invalid SIM Card | Even with a working SIM, the phone rejects it. |
| Wi-Fi and Bluetooth MAC addresses change on every reboot | A clear sign of NV corruption. |
| Phone restarts when trying to access network settings | Severe corruption causing modem crashes. |
If you experience any of these after flashing firmware or trying to root, your NV Data file is almost certainly corrupt or missing.
If you are using a JTAG box (Medusa, EasyJTAG) or a RIFF box, you need a full NV_Dump.bin file for the G920F. These are not found on public forums due to legal IMEI cloning risks.
Safe sources for certified repair professionals: