If the Flash Tool doesn't see the phone, check your Device Manager . You may need to manually point the "Unknown Device" to the installed VCOM driver folder.

Open Flash_tool.exe , click on Scatter-loading , and select the MT6572_Android_scatter.txt file from your firmware folder. Prepare the Phone: Turn off the Explay Rio

: This is the .zip or .rar containing the scatter file and system images. Step-by-Step Installation (General Procedure)