This usually means the file is corrupted. Redownload the verified flash file.
An Xmobile X3 flash file (also known as Stock ROM) is the official operating system provided by the manufacturer. Flashing this file essentially "reinstalls" the phone's software from scratch. Why Use a Verified Flash File? xmobile x3 flash file verified
A green circle or "Download OK" message will appear once the process is finished. Disconnect your device and power it on. Note that the first boot may take 5-10 minutes. Troubleshooting Tips This usually means the file is corrupted