Click on the Play icon (Start Downloading) button.
If the progress bar does not start, your computer is not communicating with the phone. Reinstall the USB drivers, try a different USB port (preferably a USB 2.0 port on the back of the PC), or try a different USB cable. Xmobile X3 Flash File
You want to change the current OS version. Click on the Play icon (Start Downloading) button
Download the Xmobile X3 Flash File and the SPD Upgrade Tool. Extract both files to a convenient location on your computer. Step 2: Open the Flashing Tool You want to change the current OS version
: Download and extract the Xmobile X3 Flash File and the SPD Flash Tool . Install the Spreadtrum USB drivers on your PC.
Click on the Play icon (Start Downloading) button.
This will help me offer more specific troubleshooting steps for your situation.