.Install driver
Switch off the phone, connect it with PC. If there is no driver installed in the PC before, it will ask you to install driver.
You need to follow the install wizard, don't choose intall automatically, but to browse and select the rom you download before for the driver
The driver is in the foldder: USB??metaMT6516 BootLoader VCOM
.Install the rom
a). Run Flash_tool.exe from the folder named " SP_Flash_Tool_v3.1304.0.119 "
b). Press Scatter-loading (right side)
c). Choose MT6589_Android_scatter_emmc.txt from the folder named " target_bin "
d). Check USB Mode?DA Download All (in the drop-down list of Options) and DA DL All With Check Sum (up side), IMPORTANT !!!
e). Press : Firmware -> Upgrade. The progress bar moves on. When the purple prograss bar goes to the end, put back the battery and insert the upgrage cable to start upgarde.