Official Lenovo S939 Stock Rom Flash This firmware if your device having problems on software like lost recovery, hardbrick or boot screen. How to flash firmware to unbrick Lenovo s939 using sp-flashtool —-> READ HERE ROM Descriptions : Build Number : S939_S921_VIBEUI_V2.0_1439_7.4.1_ST_S939_WC9F.zip Date :…