The Spreadtrum IMEI Tool V4.1 is a powerful testament to the ingenuity of the mobile repair community. It recovers phones that manufacturers would otherwise declare e-waste. However, with great power comes great responsibility.
Do: Restore your original IMEI from a backup or the phone’s physical sticker.
Don’t: Generate random IMEIs or copy another phone’s number.
If you follow the guide above and respect the legal boundaries, you can successfully revive a dead Spreadtrum phone in under 10 minutes. Just remember to always backup your NV data first, and keep a copy of the original IMEI in a safe place—physical or digital.
Disclaimer: This article is for educational purposes. The author and platform do not condone illegal IMEI alteration. Always comply with your local telecommunications laws.
Spreadtrum IMEI Tool V4.1 (also known as the WriteIMEI Tool ) is a specialized Windows utility used to repair or write IMEI numbers on mobile devices powered by Spreadtrum (SPD) or UNISOC chipsets. Tool Overview
This tool is primarily used by technicians to restore original IMEI numbers after a firmware flash or if the device’s security partition has been corrupted. It functions by communicating with the device in "Calibration Mode," a factory test state where the bootloader accepts commands via an emulated COM port. Key Features Multi-Identifier Writing
: Supports writing IMEI, Bluetooth addresses, Wi-Fi addresses, and serial numbers. Dual-SIM Support
: Capable of writing multiple IMEI fields simultaneously for dual-SIM devices. Mode Versatility
: Offers "Normal Mode" and "Calibration Mode" for different connection requirements. Wide Compatibility
: Works with a variety of Spreadtrum-based devices from brands like Infinix, Tecno, itel, and Alcatel. General Usage Procedure Driver Installation
: Requires the installation of specific Spreadtrum USB drivers to ensure the PC recognizes the device's diagnostic port. Connection
: The device is typically connected to the PC while powered off, often using a "boot key" (like Volume Down) to trigger the correct port. Port Selection : In the tool, users must select the correct assigned to the device in Windows Device Manager. Data Entry
: Users enter the 15-digit IMEI number found on the device's original box or under the battery.
: Clicking "Write" sends the data to the device. A "PASS" message indicates a successful write. Important Considerations Legal Warning
: In many jurisdictions, changing an IMEI number to anything other than the original factory-assigned number is illegal. This tool should only be used for repair and restoration
: Improper use of IMEI tools can lead to permanent loss of network connectivity or "bricking" of the device. needed for this tool or a list of supported Spreadtrum chipsets Spreadtrum Imei Tool V4.1
I’m unable to provide a full article or guide for Spreadtrum IMEI Tool V4.1, as it is commonly associated with repairing or rewriting IMEI numbers on mobile devices — an action that is illegal in most jurisdictions unless performed by the device’s manufacturer or an authorized service center with proper documentation.
Altering or restoring an IMEI without legal authority can violate:
If you need help with a legitimate IMEI restoration for a Spreadtrum/UNISOC device you own, I recommend:
Would you like a legally safe, educational article on how IMEI works and why it must not be altered, instead?
The Spreadtrum IMEI Tool V4.1 (also known as the SPD WriteIMEI Tool) is a specialized utility used to restore or repair the International Mobile Equipment Identity (IMEI) numbers on devices powered by Spreadtrum (UNISOC) chipsets. This tool is essential for technicians and DIY enthusiasts when a device loses its network connectivity due to an "Invalid IMEI" or "Null IMEI" error, often caused by software flashing or system corruption. Key Features of Spreadtrum IMEI Tool V4.1
IMEI Repair & Restore: Its primary function is to write the device's original 15-digit IMEI back to the hardware.
Multi-SIM Support: It can repair IMEI 1 and IMEI 2 for dual-SIM devices.
Address Configuration: Beyond IMEI, the tool can also write Bluetooth, Wi-Fi, and serial number addresses if these files are damaged.
Wide Compatibility: Works across various brands using SPD chipsets, including Infinix, Tecno, and Itel.
No Box Required: Unlike professional service boxes, this software-only solution can often be used for free. How to Use the Tool
To use the tool effectively, follow these generalized steps derived from technical guides:
Install Drivers: Ensure the latest SPD/UNISOC USB drivers are installed on your PC so the device is recognized in "Diag Mode".
Enable Diag Mode: The device typically needs to be in Diagnostic (Diag) mode. This often requires holding specific volume buttons while connecting to a PC. Configure Settings: Launch WriteIMEI.exe.
Select the correct COM Port matching your device in the Windows Device Manager.
Click "Set" or "Mode Select" and choose "Normal Mode" or "Calibration Mode" depending on your device's state. The Spreadtrum IMEI Tool V4
Enter IMEI Data: Input the original 15-digit IMEI numbers found on your device's box or under the battery.
Write and Verify: Click the "Write" button. Once the tool displays a "Pass" message, disconnect the device and dial *#06# to verify the restoration. Critical Safety and Legal Warnings
Spreadtrum IMEI Tool V4.1 is a specialized utility designed for devices powered by Unisoc (formerly Spreadtrum) chipsets. It is primarily used to restore or repair the International Mobile Equipment Identity (IMEI) number, which can become corrupted or "invalid" after flashing a new ROM, performing a factory reset, or encountering software glitches. Key Features and Compatibility
Broad Chipset Support: Specifically tailored for Spreadtrum (SPD) and Unisoc processors.
Multi-Brand Utility: Works with various Android brands that use these chipsets, including Tecno, Infinix, Oppo, Realme, and itel.
Comprehensive Data Writing: Beyond the 15-digit IMEI, the tool can write Bluetooth addresses, Wi-Fi addresses, and serial numbers.
Mode Versatility: Supports multiple repair methods, including Normal Mode and Diag Mode (Diagnostic Mode) for various device states. How to Use Spreadtrum IMEI Tool V4.1
To use the tool effectively, the device must typically be connected to a PC in Diagnostic (Diag) Mode.
Preparation: Install the necessary Spreadtrum USB drivers on your computer to ensure the device is recognized in the Device Manager.
Configuration: Launch the WriteIMEI.exe application. In the tool settings, select the correct COM port identified in your Device Manager.
Mode Selection: Choose the appropriate connection mode (usually Normal Mode or Calibration Mode) depending on the specific device requirements.
Input Data: Under the "Select" or "Set" menu, enable the IMEI fields. Enter the valid 15-digit IMEI numbers (IMEI 1 and IMEI 2 for dual-SIM devices).
Execution: Click the Write button. Once the process is finished, a "PASS" message will indicate a successful repair. Important Considerations
Legal Warning: Changing or altering an IMEI number is illegal in many jurisdictions. This tool should only be used for repair and restoration of the original IMEI that belongs to the device.
Educational Use: Many technical guides emphasize that these tools are intended for educational and repair purposes to fix "No Service" or "Invalid IMEI" issues. Disclaimer: This article is for educational purposes
Alternative Tools: For more advanced users or different chipsets (like MediaTek or Qualcomm), other tools such as TFM Tool Pro or Chimera Tool offer similar diagnostic and repair features.
Write feature in the Spreadtrum (SPD) IMEI Tool V4.1 (and similar versions)
allows users to flash or repair the IMEI, Bluetooth, and Wi-Fi addresses on devices using Spreadtrum/UNISOC chipsets Core Write Capabilities IMEI Writing
: Allows for the manual input of 15-digit IMEI numbers for both SIM 1 and SIM 2. Multiple Modes : Supports different connection methods, such as: Calibration Mode
: Used for manual IMEI input and saving changes directly to the device. Normal Mode : Typically requires the device to be in Diag (Diagnostic) Mode to read and then write the new information. Additional Address Support : Beyond IMEI, the tool can write: Bluetooth addresses. Wi-Fi MAC addresses. Device serial numbers. Operational Steps Preparation
: Install necessary SPD drivers on a PC and boot the phone into or power it off before connecting. Configuration
: In the tool, select the correct COM port and choose between Manual Input Auto-generated IMEI : After entering the original stock IMEI, click the
button. A "PASS" message in the tool indicates a successful write. Verification : Users can confirm the write was successful by dialing on the handset. versions are supported by this tool? Mobile Hardware Technician Firmware Developer How to use Spreadtrum WriteIMEI tool
Spreadtrum IMEI Tool V4.1 (also known as the tool) is a utility used to repair or write IMEI numbers on devices powered by Spreadtrum (now Unisoc) chipsets. This is commonly used for troubleshooting "Invalid IMEI" or "No Service" issues on brands like Infinix, Tecno, Micromax, and Lava. Prerequisites SPD USB Drivers
: Ensure you have installed the correct Spreadtrum/Unisoc drivers on your PC so the device is recognized in Original IMEI : Locate your device's original IMEI, usually found on the retail box battery compartment , or by dialing if the phone still boots. Step-by-Step Guide Launch the Tool : Open the WriteIMEI.exe application from the extracted folder on your PC. Configure Settings button to configure the tool for your device. Mode Select Normal Mode (or the mode specific to your device's state), and click Port Selection
Connect your device to the PC via USB. It may need to be in "Diag Mode" to appear in the Device Manager. In the tool, select the corresponding from the port dropdown menu. Enter IMEI Data Manually enter or paste the valid 15-digit IMEI(s) into the (and IMEI 2, if applicable) fields. If you need to fix Bluetooth or Wi-Fi addresses, click and check the corresponding boxes for those addresses. Write IMEI
If the device was disconnected, connect it now (sometimes while holding a boot key or inserting the battery). Wait for the progress bar to finish; a green message indicates a successful write. : Restart your phone and dial to verify that the IMEI has been updated. Important Safety Note:
Modifying an IMEI number is illegal in many jurisdictions unless you are restoring the device's original factory-assigned IMEI for repair purposes. or a specific video tutorial for your phone model? How to use Spreadtrum WriteIMEI tool
Use Spreadtrum IMEI Tool v4.1 only for legitimate repair and maintenance tasks. Maintain backups and logs, follow device‑specific guides, and comply with applicable laws and carrier policies.
| Error Message | Likely Cause | Solution |
|----------------|---------------|-----------|
| "Failed to open port" | Wrong COM port or driver not installed | Reinstall SPD drivers; try all USB ports. |
| "Chip not supported" | Phone has a newer Unisoc SoC | Use Spreadtrum IMEI Tool V5.0+ or Miracle Box. |
| "IMEI Write Fail at 50%" | Write protection on NV partition | Reflash stock ROM’s nvitem or use factory firmware. |
| "Checksum mismatch" | Corrupted tool or antivirus interference | Disable antivirus; redownload tool from a different source. |