Write oem file wich included in the File And Flash This Firmware In Upgrade Mode
STK-L21MDV 10.0.0.323(C185E6R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.311(C185E6R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.305(C185E6R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.257(C185E3R3P1)_Firmware_EMUI10.0.0_05016JQJ
STK-L21MDV 10.0.0.223(C185E3R3P1)_Firmware_EMUI10.0.0_05016JQJ
STK-L21MDV 10.0.0.217(C185E3R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.211(C185E3R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.198(C185E3R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 10.0.0.191(C185E3R3P1)_Firmware_EMUI10.0.0_05016HBY
STK-L21MDV 9.1.0.339(C185E3R3P1)_Firmware_EMUI9.1.0_05016HBY
STK-L21MDV 9.1.0.336(C185E3R2P1)_Firmware_EMUI9.1.0_05016HBY
Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)
STK-L21MDV 10.0.0.323(C185E6R3P1)_Firmware_EMUI10.0.0_05016JQJ