Download Extra-Tools SPD Diag Tool v1.0 (Latest Version) Free 2026

Are you a mobile technician dealing with Spreadtrum or Unisoc Android phones that won’t reboot, have display backlight issues, or lost VoLTE after a firmware flash? The Extra-Tools SPD Diag Tool v1.0 is a free, portable Windows utility built specifically to solve these exact everyday repair problems — quickly, offline, and without any heavy software.

From factory reset, device reboot, power off, IMEI reading, and backlight repair to sending custom AT commands for VoLTE and IMS fixing — this small but powerful tool handles the tasks that save technicians the most time in a busy repair shop. In this guide, you’ll find the full feature list, VoLTE AT commands, step-by-step usage instructions, and download link — everything you need in one place.

Table of Contents

What Is Extra-Tools SPD Diag Tool?

The Extra-Tools SPD Diag Tool v1.0 is a lightweight, free portable Windows program designed for mobile repair technicians working with Spreadtrum (SPD) and some MediaTek (MTK) Android smartphones. It connects to the device via the SPD Diag Port over USB and allows technicians to perform essential repair operations directly from a PC — without needing a heavy flashing suite or paid license.

It is especially popular in repair shops for fixing VoLTE issues after firmware flashing, restoring display backlight, and performing factory resets on Unisoc devices where standard methods are unavailable.

🔑 Why use Extra-Tools SPD Diag Tool? It’s 100% free, portable (no installation needed), works completely offline, and opens in seconds — saving valuable repair time on common SPD device issues.

Why Use Extra-Tools SPD Diag Tool?

✅ 100% Free — no license, dongle, or subscription needed
✅ Portable — no installation required, works anywhere
✅ Fully offline — no internet connection needed
✅ Fixes backlight, VoLTE, FRP, and factory reset in one tool
✅ Supports custom AT commands for advanced modem configuration
✅ Ultra-lightweight — opens and runs in seconds
✅ Compatible with all major Unisoc / SPD chipsets
✅ Trusted and used by mobile repair shops worldwide

Key Features of Extra-Tools SPD Diag Tool v1.0

📶 IMEI & Device Information

Read IMEI — check device IMEI information directly
Quick device identification for accurate repair diagnosis
Supports both single and dual SIM device detection

🔆 Display & Hardware Fix

Turn ON Backlight — fix black screen / display light issues instantly
One-click solution for backlight problems after firmware flashing
Works on devices where display light fails in normal boot

🔄 Device Control

Reboot — restart phone safely with one click
Power OFF — shut down device directly from PC
Charging Battery support option
No need to physically access device buttons for basic operations

🔧 Software & Data Functions

Factory Reset — wipe user data and restore phone to stock state
Safe and quick data wipe via Diag port connection
Useful when touchscreen is damaged and normal reset is impossible

📡 AT Commands (VoLTE & IMS)

Send custom AT commands directly to the device modem
Fix VoLTE missing after firmware flash or FRP work
Configure IMS registration for supported devices
Supports MTK and SPD modem AT command protocols

💡 Usability & Performance

✅ 100% Free — no license, dongle, or activation needed
✅ Portable — no installation required, just extract and run
✅ Fully offline — no internet connection needed
✅ Ultra-lightweight — small file size, fast execution
✅ Works on low-end and old PCs without issues
✅ Clean, simple interface suitable for all skill levels

Download Extra-Tools SPD Diag Tool v1.0

File Name: Extra-Tools SPD Diag Tool v1.0.zip
Version: v1.0 (Latest 2026)
File Size: 9 MB
Platform: Windows 7 / 8 / 10 / 11 (32-bit & 64-bit)
Password: No Password
Developer: Extra-Tools Team

Download (Proton Drive)

What’s New in Extra-Tools SPD Diag Tool v1.0

This is the first official public release of the Extra-Tools SPD Diag Tool. Key additions in v1.0 include:

🆕 First public release of Extra-Tools SPD Diag Tool
✅ Added IMEI Read function
✅ Added AT Command sending support for VoLTE and IMS
✅ Added Reboot and Power OFF options
✅ Added Turn ON Backlight feature
✅ Added Factory Reset via Diag port
✅ Improved SPD Diag Port connection stability
✅ Better compatibility with modern Android Unisoc devices

How to Install Extra-Tools SPD Diag Tool v1.0

Since this is a portable tool, no traditional installation is required:

Download the ZIP file using the link above.
Extract the ZIP file to any folder on your PC using WinRAR or 7-Zip.
Open the extracted folder.
Right-click Extra-Tools SPD Diag Tool v1.0.exe and select “Run as Administrator.”
The tool launches instantly — ready to use! ✅

✅ Tip: Always run as Administrator to ensure proper USB port access and driver communication.

How to Use Extra-Tools SPD Diag Tool v1.0

▶️ Basic Device Connection

Launch Extra-Tools SPD Diag Tool v1.0.exe as Administrator.
Turn OFF your Spreadtrum / Unisoc phone completely.
Connect the phone via USB cable to your PC.
Wait until the SPD Diag Port is detected in the tool.
The tool will display a connection confirmation — now select your function.

▶️ Factory Reset

Connect device and wait for Diag port detection.
Click the “Factory Reset” button.
Confirm the action — ⚠️ all user data will be permanently erased.
Wait for the process to complete — device will reboot automatically.

▶️ Read IMEI

Connect device in Diag mode.
Click “Read IMEI.”
The tool will display the device’s IMEI number(s) on screen.
Note down the IMEI for records or further repair use.

▶️ Fix Display Backlight

Connect device in Diag mode.
Click “Turn ON Backlight.”
The display backlight will activate immediately.
✅ Issue resolved — no flashing required!

▶️ Reboot / Power OFF

Connect device in Diag mode.
Click “Reboot” to restart or “Power OFF” to shut down.
Device will execute the command instantly.

▶️ Send AT Commands (VoLTE / IMS Fix)

Connect device in Diag mode.
Navigate to the AT Command section.
Paste the AT commands one by one or in batch (see full list below).
Click “Send” after each command.
After all commands are sent, click “Reboot.”
✅ VoLTE and IMS registration will be restored after reboot!

VoLTE & IMS AT Commands (MTK Devices)

These tested AT commands can be used to restore VoLTE and IMS functionality on supported MediaTek devices after firmware flashing or FRP repair:

AT+EPCT=0,0
AT+ECFGGET="sdm_profile_prefer_sms_over_sgs_to_ims"
AT+ESBP=7,"SBP_MP_LTE_DOWNLINK_LAA_r13"
AT+EIWLCFGSET="wans_op_id","16386"
AT+ECFGSET="operator_code","16386"
AT+ECFGSET="voice_support","1"
AT+ECFGSET="video_over_ps_support","1"
AT+ECFGSET="sms_support","1"
AT+ECFGSET="ims_signaling_qci","5"
AT+ECFGSET="UA_call_precondition","0"
AT+ECFGSET="mtk_ct_volte_support","1"
AT+ERAT=6
AT+PSBEARER=1
AT+ESSP=1
AT+CGDCONT=1,"IP","ims"
AT+ESIMS=1
AT+EIMSPDN="onoff",1
AT+EIMSESS=1
AT+EIAREG=1
AT+CIREG=2
AT+EVOCD=1
AT+ESSP=1

⚠️ Important: These AT commands are tested on supported MTK devices only. Always confirm device chipset compatibility before sending commands — incorrect AT commands may cause network or software issues.

Supported Functions Summary

Function	Description
Turn ON Backlight	Fix black screen / display light issues
Factory Reset	Wipe all data and restore to stock
Power OFF	Shut down device directly from PC
Reboot	Restart phone safely via PC
Read IMEI	View device IMEI information
AT Commands	Send custom network and IMS commands
Charging Battery	Monitor or trigger battery charging mode

Supported Devices

Chipset Type	Supported
Spreadtrum / SPRD	✅ Full Support
Unisoc SC Series (SC7731E, SC9832E, SC9863A)	✅ Full Support
Unisoc Tiger Series (T310, T606, T610, T612, T616, T700)	✅ Full Support
MediaTek (MTK)	⚠️ Partial Support (AT Commands)

Compatible Brands:

✅ Itel — A-series, P-series, S-series, Vision-series
✅ Tecno — Spark-series, Camon-series, Pop-series
✅ Infinix — Smart-series, Hot-series, Note-series
✅ Samsung — Budget Unisoc models (A01 Core, A03, A03s)
✅ Symphony — Unisoc-based models (South Asia)
✅ Walton — Primo-series SPD models
✅ Generic Spreadtrum / Unisoc Android phones

⚠️ Warning

Before performing a Factory Reset, always back up all personal data — user data will be permanently erased and cannot be recovered. When sending AT commands, only use confirmed commands for your specific device model and chipset. Sending incorrect AT commands may cause network, modem, or software issues that require additional repair. This tool should be used by experienced mobile technicians for legitimate repair purposes only.

Important Notes

🛡️ Virus Status: This tool was scanned with Kaspersky Antivirus before uploading — 100% safe to use. Antivirus false positives are common with Diag port tools; temporarily disable your antivirus during extraction if needed.

📌 Credit: Full credit goes to the Extra-Tools Team for developing and sharing this tool free of charge with the GSM repair community.

🔌 USB Driver: If your SPD device is not detected, install the Unisoc / SPD USB Driver first. Make sure the phone is in Diag Mode — not charging-only mode — before connecting.

Frequently Asked Questions (FAQs)

❓ Is Extra-Tools SPD Diag Tool completely free? Yes — Extra-Tools SPD Diag Tool v1.0 is 100% free. No activation, license, or hardware dongle is required.

❓ Does the tool require installation? No. It is a fully portable tool — just extract the ZIP and run the EXE file directly. No installation wizard needed.

❓ Can I fix VoLTE issues using this tool? Yes. The tool supports sending custom AT commands for IMS and VoLTE configuration on supported SPD and MTK devices.

❓ Why is my SPD phone not being detected? Make sure the correct Unisoc / SPD USB Driver is installed, the phone is turned OFF before connecting, and it connects via the SPD Diag Port (not just charging mode). Try a different USB cable or port if detection fails.

❓ Will Factory Reset erase all my data? Yes — Factory Reset permanently wipes all user data including contacts, photos, apps, and settings. Always back up data before using this function.

❓ Does it work on Windows 11? Yes. Extra-Tools SPD Diag Tool is fully compatible with Windows 7, 8, 10, and 11 on both 32-bit and 64-bit systems.

❓ Can I use AT commands on Spreadtrum devices too? The AT command feature is primarily tested on MTK devices. Compatibility on SPD devices may vary depending on the specific chipset and modem firmware version.

Conclusion

The Extra-Tools SPD Diag Tool v1.0 punches well above its weight as a free, portable utility for Spreadtrum and Unisoc Android repair. Whether you’re fixing a black screen backlight issue, performing a factory reset on a broken-touchscreen device, reading IMEI for diagnosis, or restoring VoLTE with AT commands — this tool handles it all in seconds without any paid license or internet connection.

For mobile repair shops dealing with high volumes of budget SPD devices daily, having this lightweight tool in your toolkit is a no-brainer. Download Extra-Tools SPD Diag Tool v1.0 now and add one of the most useful free Unisoc tools available in 2026 to your repair arsenal! 🚀

Have you used Extra-Tools SPD Diag Tool before? Share your experience in the comments below!

Download Extra-Tools SPD Diag Tool v1.0 (Latest Version) Free 2026

What Is Extra-Tools SPD Diag Tool?

Why Use Extra-Tools SPD Diag Tool?