Nv Items Reader Writer Tool - Fixed
The NV Items Reader Writer Tool is a utility used primarily for backing up and restoring Non-Volatile (NV) items—specifically the IMEI number—on Qualcomm-based mobile devices, such as older Samsung Galaxy models. It is particularly useful for recovering lost network connectivity or IMEI information after a firmware update. Prerequisites
Samsung USB Drivers: Ensure the latest Samsung USB Drivers are installed on your PC.
USB Cable: A high-quality OEM cable for a stable connection.
USB Debugging: Enable this in your phone’s "Developer Options."
The Tool: Download and extract the NV Items Reader Writer Tool from a reputable source. Step-by-Step Usage Guide 1. Put the Phone in Diagnostic Mode
The tool cannot see your device unless it is in a specific data-exchange mode. nv items reader writer tool
Open your phone's dialer and enter *#7284# (Note: codes may vary by device; some use *#0808#).
In the PhoneUtil or USB Settings menu, select Qualcomm USB Settings.
Select the option RMNET + DM + MODEM (or "DM+MODEM+ADB") and tap OK. 2. Connect and Identify COM Port Connect your device to the PC. Right-click "This PC" > Manage > Device Manager.
Look under Ports (COM & LPT) for "Samsung Mobile USB Serial Port" and note the COM Number (e.g., COM3). 3. Backing Up NV Items
Right-click NV-items_reader_writer.exe and Run as Administrator. The NV Items Reader Writer Tool is a
In the "Port" dropdown, select the COM port you identified in Step 2.
Click the Connect button (the circle indicator should turn green). Check the boxes for Read and click the Read button.
To back up your IMEI specifically, the tool typically targets Item 00550.
Save the resulting file (usually a .txt or .qcn format) in a safe location. 4. Restoring NV Items Follow the connection steps above. Instead of "Read," select the Write tab. Locate your saved backup file. Click Write to flash the NV items back to the device. Once completed, reboot your phone. Important Warnings
Device Compatibility: While highly effective for Samsung S3/S4 era devices, newer smartphones often have encrypted EFS partitions that this tool cannot access. Design and Implementation of an NV Items Reader
Risk Factor: Writing incorrect NV items can permanently damage your phone's radio/modem capabilities ("hard bricking").
IMEI Legality: This tool should only be used to restore your original IMEI. Changing an IMEI to a different number is illegal in many jurisdictions.
The NV Items Reader Writer Tool manages non-volatile data, such as IMEI and EFS, on Qualcomm-based devices, often used for data restoration. It requires enabling diagnostic mode, installing drivers, and careful operation to avoid permanent device damage. Read the full guide at DroidViews. EFS Backup and Restore Guide for Samsung | PDF - Scribd
1. Download NV-Items_Reader_Writer_Tool.zip and extract the zip PC Make. sure you have installed SAMSUNG DRIVERS on your computer.
Design and Implementation of an NV Items Reader Writer Tool for Embedded Configuration Management
Author: AI Research Model
Publication Date: April 2026
Journal: Journal of Embedded Systems & Firmware Engineering
5.2 Error Reduction Comparison
| Method | Error Rate (per 1000 writes) | Root Causes | |--------|-------------------------------|--------------| | Manual hex editing | 12.3% | Wrong offset, endianness | | Custom script | 4.7% | No validation | | Proposed tool | 0.6% | Schema + CRC + atomicity |
2.2 Existing Tools
- Memory monitors (J-Link, OpenOCD) – low-level, no item parsing.
- Vendor-specific utilities (e.g., STM32CubeProgrammer) – limited to one MCU family.
- Custom Python scripts – not reusable, lack error handling.
Our tool generalizes NV item access with a plugin-based transport and item definition via TOML/JSON schemas.