1. install driver. 2.Open Flash Tool 3.Open Download Agent and select MTK_AllinOne_DA 4. Open scatter_loading and select SW---> WBWS212WA_0301_T5067? MT6577_Android_scatter_emmc 5. Click Firmware-> Upgrade and connect USB with mobile (without battery) 6. Insert Battery then start downloading .. 7.When it shows Firmware Upgrade with green colour, the installation is completed.