: Connect your device to specialized service tools to unlock a device after a factory reset.

Expected output:

Look at the device itself or in (Windows):

Choose the .inf file, click Open, and confirm the installation. Troubleshooting Common Connection Issues Device Not Detected in Flash Mode

: Modern Windows editions block drivers that lack an official Microsoft digital signature. You must temporarily disable this feature via the Windows Advanced Startup menu.

The SPD Driver (Spreadtrum Device Driver) is a set of software components that allow your Windows computer to communicate with mobile devices using Unisoc processors.

: Safely write stock ROMs using tools like the SPD Upgrade Tool or Research Download Tool.

But before you click any random download button, it is crucial to understand what this driver is, why version 20.0114 matters, and—most importantly—how to find the .

To help troubleshoot any specific errors you are running into, let me know: What is the of the device you are connecting? Which Windows version is your computer currently running?

Alternatively, in , double-click your SPD device → Driver tab → Driver Version: 20.0.114.0 .

Firmware updates carry a risk of failure. Please follow the instructions provided by your manufacturer carefully. This article is for informational purposes and directs users to official vendor resources.

The computer lost track of the boot key command during connection.

Find the "Unknown Device" or "Spreadtrum" entry, right-click, and select .