Write oem file wich included in the File And Flash This Firmware In Upgrade Mode
STK-L21HN 10.0.0.199(C10E5R1P1)_Firmware_EMUI10.0.0_05016FRA
STK-L21HN 10.0.0.183(C10E3R1P1)_Firmware_EMUI10.0.0_05016FRA
STK-L21HN 9.1.0.299(C10E1R1P2)_Firmware_EMUI9.1.0_05016FRA
Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)
Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)