CheckX Tool is a lightweight production testing and verification utility developed by Unisoc (formerly Spreadtrum). It is primarily used by manufacturers, service centers, and production line technicians to verify critical software, hardware, calibration, and security information on Unisoc-powered devices before they are shipped to customers.
The tool helps ensure that a device has successfully completed all required manufacturing and testing stages. It can verify IMEI numbers, Wi-Fi MAC addresses, Bluetooth addresses, Serial Numbers, calibration data, security flags, software versions, and more.
If you’re working with Unisoc devices and need a reliable verification utility, you can download the latest version of the CheckX Tool from the links provided below.
CheckX Tool is part of the Unisoc manufacturing ecosystem and is commonly used during production and quality assurance processes. It connects to devices running in Calibration Mode and verifies whether all essential device parameters have been correctly written and calibrated.
Unlike flashing tools, CheckX does not install firmware. Instead, it performs verification checks to ensure device integrity, calibration accuracy, and production readiness.
IMEI, Bluetooth, Wi-Fi, and Serial Number Verification
The tool can verify:
- IMEI 1, IMEI 2, and additional IMEI slots
- Bluetooth MAC Address
- Wi-Fi MAC Address
- Device Serial Number (SN)
It also supports barcode scanner input for faster production-line operation.
Phase Check and Station Verification
CheckX validates whether a device has completed previous manufacturing stages successfully.
Supported station checks include:
- Download
- WriteSN
- CFT
- BBAT
- Aging Test
- Factory Verification
This helps prevent incomplete devices from moving further down the production line.
Calibration Verification
The tool checks calibration flags for:
- GSM
- WCDMA
- TD-SCDMA
- LTE
- ADC
This ensures proper radio and hardware calibration before shipment.
Security Flag Inspection
CheckX can verify several security-related configurations, including:
- Secure Boot Status
- SIM Lock Status
- IFAA Certification
- SOTER Status
- Attestation Keybox
- Security Deployment Flags
The tool can display:
- AP Software Version
- Modem Version
- Memory Information
- Device Configuration Details
- ICCID Information (BBAT Mode)
Voltage and Current Testing
When used with a compatible programmable power supply, CheckX can perform:
- AUX Voltage Testing
- FGU Voltage Testing
- Power-On Current Testing
- Charging Current Testing
- Deep Sleep Current Testing
- Power-Off Current Testing
Users can configure custom specifications and limits for testing.
Customizable Configuration
Through the CheckX.ini and PhaseCheck.ini configuration files, users can customize:
- Serial Number Length
- Loop Count
- Timeout Values
- Station Names
- Barcode Scanner Support
- Verification Rules
You can download the latest versions of CheckX Tool for Windows below.
System Requirements
Before using CheckX Tool, make sure your PC meets the following requirements:
Supported Operating Systems
- Windows XP
- Windows Vista
- Windows 7
- Windows 8
- Windows 8.1
- Windows 10
- Windows 11
Additional Requirements
- Unisoc USB Drivers
- USB Data Cable
- Unisoc Device in Calibration Mode
- Administrator Rights on Windows
- Optional Programmable Power Supply (for current and voltage testing)
Follow these steps to use CheckX Tool on a Windows PC.
Step 1: Install Drivers
Download and install the required Unisoc USB drivers on your computer.
Extract the downloaded CheckX Tool package to any folder on your PC.
Step 3: Launch CheckX
Run the CheckX executable file as Administrator.
Step 4: Put Device into Calibration Mode
Boot the supported Unisoc device into Calibration Mode (0x81 or 0x8E mode).
Step 5: Connect the Device
Connect the device to the PC using a USB cable.
Step 6: Detect the Device
Once connected, the tool should automatically detect the device and display available information.
Select the desired checks, such as:
- IMEI Verification
- Wi-Fi Verification
- Bluetooth Verification
- Calibration Check
- Security Verification
- Version Verification
Step 8: Review Results
After the verification process completes, the tool will display pass or fail results for each test item.
Notes
Important Information
CheckX Tool is intended primarily for production testing and factory verification of Unisoc devices.
The device must be running in Calibration Mode (0x81 / 0x8E) for most functions to work correctly.
For voltage and current measurements, a compatible programmable power supply may be required.
CheckX Tool is commonly used alongside:
- Factory Download Tool
- Research Download Tool
- Upgrade Download Tool
- CFT Tool
- Simba Tool
Together, these tools form the complete Unisoc manufacturing and servicing workflow.
Frequently Asked Questions (FAQs)
CheckX Tool is used to verify software, hardware, calibration, and security information on Unisoc-powered devices during manufacturing and servicing.
No. CheckX is a verification utility and does not flash firmware. For firmware installation, use Factory Download Tool or Research Download Tool.
Which devices are supported?
The tool supports devices powered by Unisoc (Spreadtrum) chipsets that can enter Calibration Mode.
Most publicly available versions can be downloaded and used without a license, although some factory-specific versions may require authorization.
Why is my device not detected?
Make sure:
- Unisoc USB drivers are installed.
- The device is in Calibration Mode.
- The USB cable is working properly.
- Windows recognizes the device correctly.
What is Calibration Mode?
Calibration Mode is a special diagnostic mode used by Unisoc devices for factory testing, calibration, and verification procedures.
Can CheckX repair IMEI numbers?
No. CheckX is designed to verify information, not write or repair IMEI numbers.
Which Windows versions are supported?
CheckX Tool supports Windows XP, Vista, 7, 8, 8.1, 10, and 11, including both 32-bit and 64-bit editions.
Conclusion
CheckX Tool is an essential utility for technicians and manufacturers working with Unisoc-powered devices. It provides a fast and reliable way to verify IMEI information, calibration data, security flags, software versions, and production-line completion status. If you’re involved in device testing, quality control, or servicing, CheckX Tool can significantly streamline your workflow.
If you have any questions about CheckX Tool or encounter any issues while using it, feel free to leave a comment below.
