IMEI Write Tool R3.0.0001 Free Download for Windows [2026]

After firmware flashing or hardware repair, a missing or corrupted IMEI can make an Android device useless. IMEI Write Tool helps technicians restore the original IMEI on Spreadtrum (SPD) and UniSoc smartphones, tablets, and feature phones, with support for single/multiple IMEI, Serial Number, Bluetooth, and Wi-Fi data.

What is an IMEI Write Tool?

IMEI Write Tool is a lightweight Windows utility for Android devices. It helps technicians to restore device identity data such as IMEI, Serial Number (SN), Bluetooth Address, and Wi-Fi Address after legitimate software or hardware repairs. It has a simple interface for mobile servicing, making it easier to handle device identity operations without a complicated setup. Compatibility depends on the device model, chipset, drivers, and tool version.

Key Features Of Write IMEI Tool

IMEI Writing

IMEI Write Tool is the main function of Write IMEI Tool for supported Spreadtrum (SPD) and UniSoc devices. It helps technicians restore the original manufacturer-assigned IMEI when device identity data is lost.

Flash Single IMEI

Flash Single IMEI allows technicians to write one original IMEI to a supported Spreadtrum or UniSoc device. This is useful for compatible Android smartphones, feature phones, and tablets when servicing a single-SIM device.

Flash Multiple IMEI

Flash Multiple IMEI is designed for supported dual-SIM and multi-SIM devices with more than one IMEI. Technicians can enter the required original IMEI entries and use the available writing process on compatible Spreadtrum (SPD) and UniSoc devices.

Read IMEI

Read IMEI allows technicians to check the IMEI information stored on a device. It can help confirm the existing device identity before servicing. On compatible dual-SIM phones, the tool may display multiple IMEI entries for the connected device.

Restore IMEI

Restore IMEI helps technicians return the device to its original manufacturer-assigned IMEI after software servicing, firmware issues, or hardware repair.

Dual Connection Mode

IMEI Write Tool provides Normal Mode and Calibration Mode for supported Spreadtrum and UniSoc devices. Use Normal Mode with the phone powered on, while Calibration Mode provides another USB connection method for supported servicing operations and compatible device configurations.

SPD / UniSoc Compatibility

IMEI Write Tool is mainly designed for Spreadtrum (SPD) and UniSoc chipsets. It can work with supported Android smartphones, tablets, and feature phones. Exact compatibility depends on the device model, chipset, firmware, USB drivers, and installed tool version.

Download Information

Information	Details
Tool Name	Write IMEI Tool
Version	R21.18.3901
File Format	ZIP
Application File	WriteIMEI.exe
Platform	Windows
Tool Type	Portable
Installation	Not Required
Main Support	Spreadtrum (SPD) / Unisoc
Primary Use	IMEI Writing & Restoration
Driver Required	SPD / Unisoc USB Driver

How to Download the IMEI Write Tool?

• Download the Write IMEI Tool R21.18.3901 ZIP package from a trusted source.
• Save the ZIP file on your Windows PC.
• Right-click the ZIP file and extract it using WinRAR or 7-Zip.
• Open the extracted WriteIMEI Tool folder.
• Find WriteIMEI.exe and run it to launch the portable tool.

How to Use the IMEI Write Tool?

• Extract the Tool: Extract the Write IMEI Tool ZIP package to a folder on your Windows PC.
• Install USB Drivers: Install the correct SPD/UniSoc USB drivers so Windows can detect the supported device.
• Connect the Device: Connect the supported phone using a proper USB cable and use the required service mode for your device.
• Open the Tool: Run WriteIMEI.exe from the extracted folder.
• Select the Port: Choose the detected COM port if the tool requires port selection.
• Select the Mode: Choose Normal Mode or Calibration Mode according to the supported device.
• Enter Original IMEI: Enter the device’s original manufacturer-assigned IMEI in the required field.
• Write IMEI: Start the writing process and wait until the operation finishes.
• Restart the Device: Reboot the phone and check the IMEI using *#06# or the device settings.

Pros & Cons

Pros	Cons
Lightweight and easy to use	Does not support every Android device
Portable and simple to run	Mainly focused on SPD/UniSoc chipsets
Supports single and multiple IMEI operations	Requires the correct USB drivers
Works with supported Spreadtrum/UniSoc devices	Device and chipset compatibility can vary
Simple Normal and Calibration modes	Some features may depend on the tool version
Fast workflow for supported devices	Not suitable for unsupported chipsets

Also check: QCN Tool V1 Free Download for QCN Edit & IMEI [2026]

Conclusion

IMEI Write Tool is a useful Windows utility for servicing Spreadtrum (SPD) and UniSoc devices. It helps technicians restore the original IMEI with Serial Number, Bluetooth Address, and Wi-Fi Address data. The tool can handle single and multiple IMEI operations through available connection modes. Its lightweight design makes device servicing simple, but compatibility depends on the phone model, chipset, drivers, and tool version.

FAQ’s

What is the latest version of Write IMEI Tool?

The latest version commonly listed by current third-party download sources is WriteIMEI Tool R21.18.3901.

Does WriteIMEI Tool support dual-SIM phones?

Yes. Supported dual-SIM and multi-SIM devices can have multiple IMEI entries.

Why does a phone show Invalid IMEI or Null IMEI?

An Invalid IMEI or Null IMEI message can appear when device identity data is erased or corrupted after firmware flashing, software repair, or hardware servicing.

Which drivers are required for WriteIMEI Tool?

WriteIMEI Tool requires the appropriate SPD/UniSoc USB drivers for supported devices. Correct drivers allow Windows to detect the connected phone and establish the required communication mode.

Can I change an IMEI with WriteIMEI Tool?

WriteIMEI Tool can perform IMEI writing operations on supported devices, but users should only restore the original manufacturer-assigned IMEI during legitimate servicing.