What is SPD IMEI Write Tool?
SPD IMEI Write Tool is a free specialized utility designed to write, restore, and repair IMEI numbers on Android smartphones powered by Spreadtrum (Unisoc) chipsets. It is an essential tool for mobile repair technicians who work with SPD-based devices that have invalid, null, or missing IMEI values caused by firmware corruption, bad flashing, or factory reset operations.
The tool communicates with Spreadtrum devices through the DIAG (Diagnostic) port, which allows direct access to the device modem and NV (Non-Volatile) memory where IMEI values are stored. In 2026, SPD IMEI Write Tool supports all modern Unisoc chipsets including the Tiger series used in budget and mid-range devices.
SPD IMEI Write Tool Features
- IMEI Write — Write primary and secondary IMEI on dual SIM SPD devices
- IMEI Read — Read current IMEI value from connected device
- IMEI Repair — Fix null or invalid IMEI caused by bad flash or corruption
- NV Backup — Backup complete NV data before any modification
- NV Restore — Restore NV data from a previous backup
- DIAG Mode — Works via Spreadtrum DIAG protocol for reliable access
- Free Tool — No license, subscription, or credits required
- All SPD Chipsets — Supports SC7xxx, SC9xxx, and Unisoc T-series chipsets
Supported SPD Chipsets
SPD IMEI Write Tool supports the following Spreadtrum and Unisoc chipsets:
- SC7731, SC7731E, SC7731G — Entry-level Spreadtrum chipsets
- SC9832E, SC9850 — Popular budget chipsets
- SC9863A — Widely used mid-range chipset in many Tecno and Infinix models
- T310, T606, T610, T612 — Unisoc Tiger entry series
- T616, T618, T700, T750 — Unisoc Tiger mid-range series
- T760, T770, T820 — Unisoc Tiger premium series
Supported Device Brands
- Tecno — Spark, Pop, Camon, Phantom series with SPD/Unisoc chips
- Infinix — Smart, Hot, Note series with Unisoc chipsets
- Samsung — Galaxy A03, A03 Core, A03s with Unisoc chips
- Nokia — Budget Nokia Android models with SPD chipsets
- Itel — All Itel SPD devices
- Micromax — India market SPD devices
- All other Android smartphones using Spreadtrum or Unisoc processors
How to Use SPD IMEI Write Tool
Requirements
- SPD USB Drivers installed on Windows PC
- Device must support DIAG mode activation
- Original IMEI number from device box or back sticker
Step by Step IMEI Write Process
- Install SPD USB Drivers on your Windows PC
- Download SPD IMEI Write Tool from the download button on this page
- Extract and open the tool
- Enable DIAG mode on your SPD device — dial ##3424# or use ADB command
- Connect device via USB after enabling DIAG
- SPD IMEI Tool auto-detects the COM port
- Click Read IMEI to check current IMEI value
- Enter the correct original IMEI from device box
- Click Write IMEI button
- Wait for success confirmation message
- Restart device and verify by dialing *#06#
How to Enable DIAG Mode on SPD Devices
Different SPD devices use different methods to enable DIAG mode:
- Dial code method — Dial ##3424# or ##66# in the phone dialer
- ADB method — Use ADB command:
adb shell setprop sys.usb.config diag,adb - Engineering menu — Some devices have engineering mode accessible via secret dial codes
SPD IMEI Write Tool All Versions
- SPD IMEI Tool V1.x — Initial version supporting SC7xxx and SC9xxx chipsets
- SPD IMEI Tool V2.x — Added SC9863A and early Unisoc support
- SPD IMEI Tool V3.x — Full Unisoc Tiger series support
- SPD IMEI Tool Latest 2026 — All Unisoc chipsets including T820 series
Important Legal Notice
Conclusion
SPD IMEI Write Tool is the most reliable free solution for IMEI repair on Spreadtrum and Unisoc chipset devices in 2026. Its support for all modern Unisoc chipsets, simple operation, and free availability make it indispensable for technicians working with Tecno, Infinix, Samsung SPD, and other Unisoc-based smartphones. Download the latest version from this page and restore full network functionality to any SPD device.