Below are three methods, ranging from beginner to advanced. Do not proceed without a full backup.
For the SM-G920T (which uses the Samsung Exynos 7420 chipset with a Shannon modem), the NV Data file stores:
When this file gets corrupted, the phone loses its identity. It’s like a person with amnesia — the hardware is fine, but the essential “memory” is blank.
This is for experts only. Using QPST (Qualcomm Product Support Tool) requires converting your Samsung’s Exynos modem to a diagnostic port — which is not always supported on the G920T (since it uses Shannon modem, not Qualcomm). In fact, QPST does not work with the SM-G920T because the modem is not Qualcomm-based.
Correction for clarity: The SM-G920T (Exynos 7420) uses a Shannon 333 modem. Most NV repair guides assume a Qualcomm chip. Do not attempt QPST on this model — you will not even get a COM port.
For Exynos Shannon modems (like G920T), the proper tool is:
If you have an SM-G920T with a NULL IMEI, follow this general workflow:
/efs/ partition where NV data lives, you typically need Root access (Kernel with SU).SM-G920T NV data file is a critical piece of Non-Volatile (NV) memory used by the T-Mobile Samsung Galaxy S6 to store essential radio frequency (RF) and device-specific information. When this file is corrupted or missing, the device typically loses its ability to register on cellular networks, often displaying a "not registered on network" error or a corrupted IMEI (e.g., an IMEI starting with "35" followed by several zeros). Role of NV Data in the SM-G920T
In Samsung devices, NV data is part of the EFS (Encrypting File System) partition. For the T-Mobile Galaxy S6 (SM-G920T) , this data is responsible for: IMEI Storage : Keeping the unique hardware identifier secure. Baseband Calibration
: Managing the modem settings required to connect to T-Mobile's 4G LTE and 3G networks. Network Locks sm-g920t nv data file
: Enforcing carrier-specific restrictions, though T-Mobile often uses a dedicated Device Unlock App rather than standard unlock codes. Common Corruption Symptoms
Users seeking this specific file usually encounter several high-level failures: IMEI Status NG
: The device fails its internal security check, rendering the IMEI "Next Generation" (NG) or invalid. Unknown Baseband
: The "Baseband version" in Settings shows as "Unknown," meaning the phone cannot communicate with its own internal modem. Security Damage Error (1)
: A common firmware-level error triggered when the security bits in the NV data do not match the system's expectations. Methods for Repair and Restoration
Restoring NV data typically requires specialized service tools because the data is hardware-encrypted and tied to the specific device. Z3X Samsung Tool Pro
: This is the industry standard for writing a "Clean" NV data file or a "Super IMEI" to fix corrupted SM-G920T units. Flashing Combination Firmware
: Technicians often flash a "combination file" (factory testing firmware) to gain low-level access to the EFS partition before writing the new NV data. NV Data Patches
: Some forums provide "patched" NV data files designed to bypass security checks, though these can be risky and may permanently trip the Samsung Knox security flag. Critical Warning for Owners The SM-G920T is unique because it uses ’s proprietary Device Unlock Below are three methods, ranging from beginner to advanced
system. Attempting to "repair" NV data to bypass a network lock is often unsuccessful through standard methods and can lead to a "Baseband Unknown" state if the wrong region's NV data is flashed. Before attempting any NV data write, it is vital to back up the existing EFS partition using a custom recovery like TWRP or specialized software. Do you need help finding the specific firmware version step-by-step repair guide for a particular error code? Sm-g920t Nv Data File [patched]
Create Free Account. Login. Close sm-g920t nv data file. App Installation. Get App to Receive Notifications from:. 3.25.54.185
The SM-G920T (Samsung Galaxy S6 for T-Mobile) NV data file is a critical partition containing the device's Non-Volatile information. This file stores unique hardware identification and calibration data necessary for the phone to function on a cellular network. What is the NV Data File?
The NV (Non-Volatile) data, often stored in the EFS partition on Samsung devices, contains: IMEI Number: The unique identifier for your device.
Baseband Version: Information required for the modem to communicate with cell towers. Product Code & Serial Number: Manufacturing details.
Calibration Data: Settings for the radio frequency (RF) hardware. Why You Might Need It
Users typically look for NV data files or backups when they encounter the following issues:
"No Service" or "Searching": The modem cannot initialize due to corrupted radio data.
Null IMEI: The IMEI shows as 0000... or Unknown, preventing network registration. When this file gets corrupted, the phone loses its identity
Baseband Unknown: The software cannot communicate with the hardware modem.
Post-Rooting/Flashing Errors: Improperly flashing custom ROMs or kernels can sometimes wipe or corrupt the EFS/NV partition. How to Manage NV Data on SM-G920T
Because NV data is unique to every individual handset, you should never flash an NV data file from another device, as this can result in a "Bad IMEI" or permanent network block.
Backing Up: Before any modification, use a tool like TWRP Recovery or Samsung Tool Pro (Z3X) to create a backup of the EFS partition.
Restoring: If your network data is corrupted, you can restore your own previously saved backup via TWRP or specialized professional service software.
Repairing: If you do not have a backup and your NV data is lost, you generally need professional repair tools (like Z3X, Octoplus, or Chimera) to "Repair Network" or "Write NV Data" using a generic template which is then re-serialized to your original IMEI.
Warning: Modifying NV data or IMEIs may be illegal in certain jurisdictions and can permanently "brick" your device's cellular capabilities if done incorrectly.
Are you trying to repair a specific error (like "No Service") or
The NV Data file is surprisingly small (usually a few megabytes), but it contains mission-critical information, including:
For most smartphone users, a phone is just the sum of its screen, battery, and camera. However, for technicians, developers, and advanced repair enthusiasts, a device like the Samsung Galaxy S6 (SM-G920T) is defined by its low-level software and data partitions. Among the most critical—and often most troublesome—of these components is the NV Data file.
If you’ve ever encountered the dreaded “Null IMEI” or “Baseband Unknown” error on your T-Mobile Galaxy S6, you have likely crossed paths with a corrupted NV Data file. Here is everything you need to know about what this file is, why it is vital, and how to handle it.