Spreadtrum Imei Tool V4.1

What or Spreadtrum chipset are you working with?

Turn your phone completely off. Hold down the Volume Down button (or Volume Up on some models) and plug the USB cable in.

When you flash a stock ROM or custom firmware using tools like SP Flash Tool , the NV partition is often overwritten. If the new firmware does not contain your device's original IMEI (common with generic ROMs), the IMEI reverts to 000000000000000 or null .

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 . Spreadtrum Imei Tool V4.1

Open Windows Device Manager. If you see a yellow triangle next to "SPRD U2S" or "Unknown Device", reinstall your SPD drivers. Disable Windows Driver Signature Enforcement before installing drivers on Windows 10 or 11. 2. "Write IMEI Failed" or "Enter Calibration Mode Fail"

This is the most critical section of this article.

: Beyond IMEI, it can write Bluetooth and Wi-Fi addresses as well as serial numbers. What or Spreadtrum chipset are you working with

Hold the designated for your specific device (usually Volume Down or Volume Up).

: The tool integrates real-time channel polling to instantly detect a device the moment it triggers its boot cycle. System Requirements

Analysis of Functionality, Risks, and Usage Category: Mobile Servicing Software / Utility Tool Target Chipset: Spreadtrum (UNISOC) When you flash a stock ROM or custom

: Power off the device and connect it to the PC via USB. Some models may require holding a boot key (like Volume Up or Down).

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