After flash do Safe mode method. Some phones have already emmc problem so phone can be BRICKED.
INE-L21R 9.1.0(C185) Downgrade Firmware For Bypass FRPSydney-L21BR 9.1.0.213(C185E1R1P2T8)_Firmware_9.0.0_r3_EMUI9.1.0_05015MPC. Aafter flash use safe method