SFD Tool GUI v2.5.2 (Latest Version) Free 2026

If you repair Spreadtrum or UNISOC phones, finding a free tool that actually covers all the basics is not easy. SFD Tool GUI v2.5.2 is a free, open-source Windows application built specifically for servicing UNISOC devices in BROM mode — covering PAC firmware flashing, partition backup and restore, XML repartitioning, boot slot switching, and several debugging utilities, all from one organized interface.

This guide covers the complete feature breakdown, installation steps, usage guide, and download links for SFD Tool GUI v2.5.2 so you know exactly what to expect before connecting your first device.

Table of Contents

What Is SFD Tool GUI?

SFD Tool GUI is a free, open-source graphical interface designed for Spreadtrum and UNISOC device repair on Windows PC. It communicates with devices through BROM mode and gives technicians a structured way to flash PAC firmware, manage partitions, switch boot slots, and debug storage issues — without needing separate utilities for each task.

Because the project lives on GitHub, the latest release is always available from the official source. There are no paid tiers, no credit systems, and no activation requirements. You download it, install it, and run it as Administrator.

Key Features of SFD Tool GUI v2.5.2

🔌 Connection & Boot Options

Connect phones in BROM mode via USB
Set custom FDL files and FDL send addresses
Enable EXEC_ADDR and EXEC_ADDR v2 options
Kick device into SPRD4 mode
Adjustable connection waiting timer
Power Off, Reboot, Recovery, and Fastboot device controls

🗂️ Partition Management

Backup complete partitions
Restore saved partitions
Write partition images back to the device
Erase selected partitions
Erase all partitions
Extract partition information
Resize existing partitions
Add new partitions
Delete partitions
Rename partition entries

🛠️ Manual Operations

Write a single partition without touching others
Extract a single partition individually
Erase a single partition by name

⚙️ Advanced Functions

Switch between Boot Slot A and Boot Slot B
XML repartition support
Export partition layout into an XML file

📦 PAC Flash

Load and unpack PAC firmware packages
View and select individual partitions before flashing
Flash support for Slot A, Slot B, and Non-AB devices

🔍 Debug Tools

Read Chip UID
Read Pactime
Check NAND storage information

⚙️ Additional Settings

Block size configuration
Rawdata mode
Timeout controls
Language options
Operation log viewer
Version update history

Download SFD Tool GUI v2.5.2

Detail	Info
Version	v2.5.2
EXE Installer Size	31.8 MB
ZIP Package Size	24.2 MB
Platform	Windows PC (64-bit)
Activation	Free — no login required
Source	GitHub (Open Source)

GitHub

Download (GitHub)

How to Install SFD Tool GUI v2.5.2

Download the EXE installer or ZIP package from the GitHub release page above.
Install Spreadtrum or UNISOC USB Drivers on your PC before proceeding.
Run the EXE installer (or extract the ZIP if you chose that package).
If Windows SmartScreen appears, click More Info and then Run Anyway — this is a standard false positive.
Complete the installation normally.
Right-click the desktop shortcut and select Run as Administrator.
A black command prompt window will open first — this is normal. The GUI launches automatically after it.

⚠️ Important: Do not close the command prompt window while using the tool. Closing it will immediately shut down the entire application.

How to Use SFD Tool GUI v2.5.2

▶️ Connecting a UNISOC Device in BROM Mode

Open the tool as Administrator.
On the welcome screen, read the BROM mode connection instructions.
Hold the volume buttons and power key on the device simultaneously.
While holding those buttons, plug in the USB cable to the PC.
The tool will detect the device and display the connection status.

▶️ Flashing PAC Firmware

Go to the PAC Flash tab.
Click to load your PAC firmware file.
The tool unpacks the file and lists available partitions.
Select which partitions to flash.
Choose Slot A, Slot B, or Non-AB depending on your device.
Start the flash and wait for completion.

▶️ Backing Up and Restoring Partitions

Go to the Partition Operation tab.
Click Backup to save the full partition set to your PC.
To restore, click Restore and select the saved backup.
Use Write if you only need to push a specific image file back to the device.

▶️ Manual Single Partition Work

Open the Manually Operate tab.
Type the partition name you want to work on.
Choose Write, Extract, or Erase for that partition only.
This saves time when you don’t need to touch the full firmware.

▶️ Switching Boot Slots

Go to the Advanced Operation tab.
Click Switch to Slot A or Switch to Slot B depending on your need.
The tool applies the change without requiring a full flash.

▶️ XML Repartition

In the Advanced Operation tab, load your XML partition layout file.
Click Repartition to apply the new layout to the device.
Use Export XML to save the current device partition layout for reference.

What the Interface Shows During Operation

The tool keeps key information visible throughout any job:

Device connection status
BROM mode confirmation
Detected storage type
Current active boot slot
Progress bar during flashing or reading operations
Full operation log
Version update history

System Requirements

Component	Requirement
Operating System	Windows PC (64-bit)
USB Drivers	Spreadtrum / UNISOC USB Driver required
Connection	USB 2.0 or 3.0
Permissions	Run as Administrator
Supported Devices	UNISOC / Spreadtrum chipset phones

⚠️ Warning

Before performing any partition erase, repartition, or firmware flash operation, always back up the existing partitions first using the built-in backup function. XML repartition and full erase operations will overwrite the existing partition layout and are not reversible without a backup. Always confirm the device chipset before connecting — SFD Tool GUI is designed for UNISOC hardware only and should not be used on other chipset families.

Important Notes

🛡️ Virus Status: The installer may trigger a Windows SmartScreen warning because the application is not widely recognized yet. This is a standard false positive for open-source repair tools distributed outside major software stores. Always download from the official GitHub release page only.

📌 Credit: Full credit goes to the SFD Tool GUI development team (GitHub: C-Hidery) for building and maintaining this free open-source project.

💻 Command Prompt Window: When you launch SFD Tool GUI, a black command prompt window opens alongside the main GUI. This is part of the application and must remain open. Closing it ends the entire session immediately.

🔌 USB Drivers: Make sure Spreadtrum or UNISOC USB drivers are already installed before connecting any device. Without the correct driver, BROM mode detection will not work.

Frequently Asked Questions (FAQs)

❓ Is SFD Tool GUI completely free? Yes. SFD Tool GUI is a free, open-source tool available on GitHub. There is no activation, no login, and no credit system required for any function.

❓ Which devices does SFD Tool GUI support? It supports phones running on UNISOC (Spreadtrum/SPD) chipsets only. MediaTek and Qualcomm devices are not supported.

❓ What is BROM mode? BROM stands for Boot ROM mode. It is a low-level hardware mode that lets the tool communicate directly with the device chipset before the Android OS loads. You enter it by holding volume and power while plugging in the USB cable.

❓ Why does a black command prompt window open with the tool? The command prompt is a backend component that the GUI depends on. It must stay open throughout your session. Do not close it manually or the entire application will shut down.

❓ Why does Windows SmartScreen block the installer? Because the application isn’t widely recognized by Windows security systems yet. It is a false positive. Download only from the official GitHub release page, then click More Info → Run Anyway to proceed.

❓ Can I flash only one partition instead of the full firmware? Yes. Use the Manually Operate tab to write, extract, or erase a single partition by name without affecting the rest of the firmware.

❓ Does the tool support A/B slot devices? Yes. The PAC Flash tab lets you choose Slot A, Slot B, or Non-AB, and the Advanced Operation tab includes direct boot slot switching controls.

Conclusion

SFD Tool GUI v2.5.2 is one of the most complete free options available for technicians who regularly work with UNISOC and Spreadtrum devices. PAC firmware flashing, full partition management, XML repartition support, boot slot switching, and debugging tools are all built into one organized interface — with no activation, no credits, and no subscription required.

If your daily repair work includes UNISOC phones, download SFD Tool GUI from the official GitHub release and test it with your devices. It’s a solid free tool that covers most common software repair tasks without needing multiple utilities open at the same time.

Have you used SFD Tool GUI on a real device? Share your experience in the comments below!

SFD Tool GUI v2.5.2 (Latest Version) Free 2026 – UNISOC Flash Tool

What Is SFD Tool GUI?