Unisoc Imei Repair Tool -

Dealing with an "Invalid IMEI" or "Null IMEI" error after a firmware flash? Restoring your device's unique identifier is essential for regaining network connectivity. 📱 Prerequisites Before starting, ensure you have the following:

Unisoc USB Drivers: Installed on your PC so the device is recognized in Diagnostic Mode.

WriteIMEI Tool: The specific utility for Unisoc/SPD chipsets.

Original IMEI: Locate this on the device box or under the battery. Note: Changing an IMEI to one that does not belong to the device is illegal in many regions. 🚀 Step-by-Step Guide

Launch the Tool: Open the WriteIMEI.exe application as an Administrator.

Configure Settings: Click on Mode Select and choose Normal Mode or Calibration Mode depending on your device state.

Enter IMEI: Go to Set (the gear icon) and select the number of IMEIs your device supports (e.g., Dual SIM). Manually type your 15-digit IMEI numbers into the fields.

Connect Device: Power off your phone. Hold the Volume Down or Volume Up key (boot key) and connect it to your PC via USB.

Start Repair: Click the Write or Start button. The progress bar will turn green and display "Passed" once the process is complete.

Reboot: Disconnect your phone and power it on. Dial *#06# to verify the restoration. ⚠️ Important Disclaimer

IMEI repair should only be performed to restore a lost original number. Always backup your NVRAM/calibration data before attempting technical repairs.

Introduction

The Unisoc IMEI Repair Tool is a software utility designed to repair and restore IMEI (International Mobile Equipment Identity) numbers on mobile devices powered by Unisoc (formerly known as Spreadtrum) chipsets. IMEI is a unique identifier assigned to each mobile device, and it's essential for network authentication, device tracking, and warranty validation. If the IMEI is damaged or lost, the device may not be able to connect to the network, and the user may face difficulties with device registration, warranty claims, and more.

System Requirements

To use the Unisoc IMEI Repair Tool, you'll need:

1. A computer with Windows operating system (Windows XP, Windows 7, Windows 8, or Windows 10)
2. Unisoc IMEI Repair Tool software (download from official sources or trusted websites)
3. A compatible Unisoc chipset-based mobile device
4. USB cable for connecting the device to the computer
5. Device drivers installed on the computer (usually provided with the device or downloadable from the manufacturer's website)

Pre-Repair Checklist

Before using the Unisoc IMEI Repair Tool, ensure:

1. Backup your data: IMEI repair may potentially wipe device data, so it's crucial to backup your important files, contacts, and messages.
2. Charge your device: Ensure your device has sufficient battery charge (at least 50%) to avoid any interruptions during the repair process.
3. Enable USB debugging: Go to your device's Settings > Developer options > USB debugging, and enable it.
4. Install device drivers: Ensure the device drivers are properly installed on your computer.

Step-by-Step Guide to Repair IMEI using Unisoc IMEI Repair Tool

1. Launch the Unisoc IMEI Repair Tool: Extract the downloaded software package and run the executable file (usually named " Unisoc_IMEI_Repair_Tool.exe").
2. Connect your device: Connect your Unisoc chipset-based mobile device to the computer using a USB cable.
3. Detect device: The tool will automatically detect your device. If not, click on the "Refresh" button to detect it manually.
4. Read IMEI: Click on the "Read IMEI" button to retrieve the current IMEI information from your device.
5. Enter new IMEI: Enter the new IMEI number you want to write to your device. You can enter a previously backed-up IMEI or obtain a new one from your network provider.
6. Repair IMEI: Click on the "Repair IMEI" button to start the repair process. The tool will write the new IMEI to your device.
7. Verify IMEI: After the repair process is complete, click on the "Read IMEI" button again to verify that the new IMEI has been successfully written to your device.

Common Issues and Troubleshooting

• Device not detected: Check USB cable, device drivers, and USB debugging settings.
• IMEI not read or written: Ensure the device is properly connected, and the tool is configured correctly.
• Device shows "Unknown" or "Invalid" IMEI: Try resetting the device, or contact your network provider for assistance.

Post-Repair Checklist

After successfully repairing the IMEI:

1. Restart your device: Reboot your device to ensure the new IMEI is applied.
2. Verify network connectivity: Check if your device can connect to the network and make calls/SMS.
3. Backup your device: Regularly backup your device data to prevent any future losses.

Disclaimer and Warning

• Use at your own risk: The Unisoc IMEI Repair Tool is provided for educational and repair purposes only. Use it at your own risk, and be aware that improper use may void your device warranty or cause permanent damage.
• Only use trusted sources: Download the Unisoc IMEI Repair Tool from official sources or trusted websites to avoid malware or modified versions.

Unisoc IMEI Repair Tool is a specialized utility used to restore or fix the International Mobile Equipment Identity (IMEI) number on smartphones powered by Unisoc (formerly Spreadtrum) chipsets. These tools are typically used when a device shows an "Invalid IMEI" error, which often happens after a bad firmware flash, a system crash, or a deep software reset. Common Unisoc IMEI Repair Tools unisoc imei repair tool

Depending on your technical expertise, different software can handle Unisoc devices: SPD (Spreadtrum) WriteIMEI Tool

: This is the official and most common free utility for Unisoc chips. It allows users to write the original IMEI back to the device's NVRAM via a PC. WriteIMEI Tool (Latest Versions)

: Modern versions support newer Unisoc architectures (like the Tiger series). You can find various versions of this utility on repositories like or developer blogs like HardReset.info Chimera Tool

: A professional, paid service that supports extensive IMEI repair functions for Unisoc/Spreadtrum devices. It is highly regarded for its "one-click" functionality and is featured on ChimeraTool's official site Pandora Box / Tool

: Another professional hardware/software combo often used in repair shops for deep system fixes on Unisoc-based brands like Infinix, Tecno, and Realme. When is IMEI Repair Necessary? Software Corruption

: If the EFS or NVRAM partition of the phone is corrupted, the IMEI may show as "0" or "Invalid," preventing the phone from connecting to cellular networks. Motherboard Replacement

: If a technician replaces a part of the hardware, they may need to re-sync the digital IMEI with the physical sticker on the phone's body. Firmware Updates

: Occasionally, an official or custom ROM update can wipe the network identification data. How it Generally Works

: You must install the correct Unisoc/SPD USB drivers on your PC so the tool can communicate with the phone in "DIAG" or "Download" mode.

: Most tools require the phone to be connected in a specific state (often by holding Volume Up/Down while plugging in the USB).

: The user enters the original IMEI (found on the box or under the battery) into the tool's interface and clicks "Write" or "Start." ⚠️ Important Legal & Safety Warning

: In many regions, including the US, UK, and India, changing an IMEI number to a different one is . These tools should only be used to restore the IMEI that came with the device.

Restoring Connectivity: A Guide to Unisoc (SPD) IMEI Repair Tools

Losing your phone's IMEI (International Mobile Equipment Identity) can turn a powerful smartphone into a paperweight, leaving you with "No Service" or an "Invalid IMEI" error. Whether this happened after a firmware flash or a system crash, specialized tools for Unisoc (formerly Spreadtrum/SPD) chipsets can help you restore your original identity and get back on the network.

Disclaimer: Changing or repairing an IMEI to something other than the original number printed on your device's box or battery sticker is illegal in many jurisdictions. Use these tools only to restore your original IMEI for legitimate repair purposes. Why Unisoc Devices Need Specific Tools

Unlike some other processors, Unisoc devices require specific drivers and communication protocols to access the NVRAM where IMEI data is stored. Common devices using these chips include budget-friendly models from Infinix, Tecno, Itel, and various generic Android tablets. Top Unisoc IMEI Repair Tools for 2026

SPD Write IMEI Tool (Recommended): The industry standard for Spreadtrum and Unisoc chips. It is a lightweight, official-style utility that allows you to input your original IMEI and write it directly to the device via a USB connection.

Chimera Tool: A professional-grade multi-purpose software that recently added robust support for Unisoc devices. It features a "Repair IMEI" tab that automates much of the process, including handling bootloader hurdles.

CarlCare IMEIWrite Tool (v7+): Often used by authorized service centers, this tool is highly effective for newer security patches (like the 2025 August patch) on Infinix and Tecno models.

Aftersales Tool: Similar to CarlCare, this is a technician-focused utility designed for factory-level IMEI writing. How to Use the SPD Write IMEI Tool: A Step-by-Step Guide

Before you begin, ensure you have a Windows PC and the original IMEI numbers handy from your device's packaging.

Install Unisoc Drivers: This is the most critical step. Without the correct SPD/Unisoc USB drivers, your PC won't recognize the phone in "DIAG" or "Download" mode. Dealing with an "Invalid IMEI" or "Null IMEI"

Verify Connection: Open Device Manager on your PC. When you connect your phone (often while holding Volume Down), you should see a port labeled SPD U2S or similar. Launch the Tool: Open the SPD Write IMEI utility.

Enter Original IMEIs: Input the 15-digit numbers for SIM 1 and SIM 2 exactly as they appear on your device's box.

Write and Reboot: Click "Start" or "Write." Once the tool shows a "Passed" or "Success" message, disconnect the phone, remove and reinsert the battery (if possible), and power it on.

Verify: Dial *#06# on your phone's keypad to confirm the IMEI has been restored. Troubleshooting Common Issues

IMEI Still "Invalid": You may need to flash the stock firmware (PAC file) first to repair the underlying system structure before the tool can write the IMEI.

Driver Errors: Ensure you are using a high-quality USB cable and try different USB ports on your PC.

NVRAM Protection: Some newer devices have locked NVRAM that requires specialized "DA" (Download Agent) files or professional tools like Chimera Tool to bypass.

Need help finding the specific driver package for your Unisoc model?

The Ultimate Guide to UNISOC IMEI Repair Tools: Restoring Connectivity and Compliance

In the world of smartphone maintenance and software repair, UNISOC (formerly Spreadtrum) has become a dominant force, powering millions of budget-friendly and mid-range devices globally. However, software glitches, failed firmware flashes, or system crashes can sometimes lead to a "Null IMEI" or "Invalid IMEI" error. When this happens, your device loses its ability to connect to cellular networks, effectively becoming a tablet.

This is where a UNISOC IMEI repair tool becomes essential. In this guide, we’ll explore what these tools are, how they work, and the best options available for technicians and DIY enthusiasts. What is a UNISOC IMEI Repair Tool?

A UNISOC IMEI repair tool is a specialized software utility designed to communicate with the device’s processor to rewrite the International Mobile Equipment Identity (IMEI) number into the handset's NVRAM (Non-Volatile Random Access Memory). Common reasons for IMEI loss include: Failed Flashing: Interrupting a firmware update.

Incorrect ROMs: Installing a custom ROM not optimized for the specific baseband.

Data Corruption: System-level crashes that wipe the EFS/NVRAM partitions. Popular UNISOC IMEI Repair Tools

Several tools cater to different skill levels, ranging from official manufacturer utilities to third-party professional boxes. 1. SPD Upgrade Tool (Official)

While primarily used for flashing firmware, certain versions of the Spreadtrum Upgrade Tool allow for the restoration of NV data if you have the correct backup files. It is the most "official" way to handle UNISOC devices. 2. WriteIMEI Tool

This is perhaps the most famous standalone utility for UNISOC chips. It is lightweight and specifically built for one purpose: writing IMEI numbers. It requires the device to be in Diag Mode or Calibration Mode to function. 3. Pandora Box / Z3X Box

For professional technicians, hardware "boxes" or "dongles" like Pandora are the gold standard. They offer high success rates and support for the latest UNISOC chipsets (like the Tiger T606, T610, and T700) that older free tools might struggle with. 4. Infinity CM2SP2

The Infinity Chinese Miracle-2 (CM2) is a legendary tool in the repair community. The SP2 module is dedicated to Spreadtrum/UNISOC platforms, offering deep-level repair functions beyond just IMEI, including bootloader unlocking and privacy lock removal. How to Use a UNISOC IMEI Repair Tool (General Steps)

Disclaimer: Repairing an IMEI is intended for restoring a device's original identity. Changing an IMEI to a different number is illegal in many jurisdictions.

Install Drivers: Ensure the SPD/UNISOC USB Drivers are installed on your PC so the computer recognizes the phone in "Spreadtrum COM Port" mode.

Enable Diagnostic Mode: Most tools require the phone to be in a specific state. This is often achieved by holding Volume buttons while plugging in the USB cable or using a dialer code like *#*#83781#*#*. A computer with Windows operating system (Windows XP,

Select the Executable: Open your chosen tool (e.g., WriteIMEI) and select the correct chipset type.

Enter IMEI Data: Input the original IMEI numbers found on the device’s box or under the battery.

Start the Process: Click "Write" or "Start." Once the tool shows a "Passed" or "Success" message, reboot the device. Crucial Safety Tips

Backup First: Always try to back up your current NVRAM/EFS data before attempting a repair.

Match the Chipset: UNISOC has many generations (SC7731, SC9863A, T606, etc.). Ensure your tool supports your specific model.

Check Laws: Always ensure you are following local telecommunications laws regarding device identification. Conclusion

A UNISOC IMEI repair tool is a lifesaver for anyone dealing with a "No Service" issue due to software corruption. Whether you use the simple WriteIMEI utility or a professional suite like CM2, having the right drivers and a bit of patience is key to bringing your device back to life.

Do you have a specific UNISOC chipset model you're trying to fix, or

3. Typical Reasons People Seek This Tool

• Null IMEI: After flashing custom ROM or stock firmware, the IMEI becomes 0 or null, causing "No Service."
• IMEI corruption: After an OTA failure or baseband (modem) corruption.
• Dual-SIM conflicts: One SIM slot loses its IMEI.
• Repair without box/ticket: Repair shops use it when genuine service center software can't fix the baseband.

4. Supported Chipset Families

• Unisoc Tiger (T606, T610, T612, T616, T618, T700, T710, T820)
• Unisoc SC series (SC9832E, SC9863A, SC7731E, etc.)
• Unisoc UIS series (UIS8581A, UIS7862 – automotive)
• Spreadtrum legacy (SC7727, SC8810, etc.) – limited support

The Ultimate Guide to Unisoc IMEI Repair Tool: Fix Null IMEI and Network Issues

B. CM2 (Infinity-Box Chinese Miracle II) - SPD Module

This is the industry standard for professional technicians. While it is paid software

A UNISOC IMEI repair tool is a specialized software utility used to restore or rewrite the International Mobile Equipment Identity (IMEI) number on mobile devices powered by UNISOC (formerly Spreadtrum) chipsets. These tools are primarily used when a device's IMEI becomes "Null" or "Invalid," often due to software corruption during flashing, rooting, or firmware updates.  Commonly Used Tools 

Several tools, both free and paid, support IMEI repair for UNISOC-based devices like Infinix, Tecno, Realme, and Itel: 

ChimeraTool: A professional, paid software suite that recently enhanced its UNISOC solution to support permanent IMEI and serial number repairs for newer chips like the T760 and T820.

SPD Write IMEI Tool / IMEIWrite: Often referred to as a "factory tool," this is a lightweight utility specifically for Spreadtrum/UNISOC processors.

Aftersales Tool v7 (CarlCare): A free tool frequently used for Tanssion-branded phones (Infinix, Tecno, Itel) even on newer security patches.

Hydra Tool: A specialized dongle-based tool that provides "one-click" repair for various Android chipsets, including UNISOC.

iReverse Unisoc Ultimate Tool: A free utility that handles FRP (Factory Reset Protection) removal, flashing, and IMEI repair.  General Repair Process 

For devices powered by Unisoc (formerly Spreadtrum/SPD) chipsets, an IMEI repair tool is specialized software used to restore a lost or "invalid" International Mobile Equipment Identity number. This often occurs due to software corruption, failed firmware flashes, or "null" IMEI errors. Popular Unisoc IMEI Repair Tools

Various tools exist ranging from free manufacturer-specific utilities to professional-grade multi-brand software:

Samsung, Android 13, IMEI Repair + Patch Certificate with Chimera

7. Target OS & Distribution

• Windows 7/10/11 (primary) – USB driver support.
• Linux (Ubuntu/Fedora) – via libusb and udev rules.
• Portable Version – no installation, minimal registry changes.

3. SigmaKey (Unisoc Module)

A professional dongle-based solution. SigmaKey is expensive but considered the gold standard for IMEI repair on locked or water-damaged Unisoc devices.

• Features: Repairs IMEI even when the phone is in dead/bricked mode, server-based database of security codes.
• Best For: High-end Unisoc phones with server authentication (e.g., Samsung A-series with Unisoc).

4. Maui META (Modified for Unisoc)

Originally a MediaTek tool, modified versions exist for Unisoc. It requires BROM (Boot ROM) mode access.

• Features: Manual NVRAM editing, band unlocking.
• Best For: Advanced users who understand hex editing.