After flash follow this (https://www.youtube.com/watch?v=aFGm6e1JzGw&feature=youtu.be)

Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)

Katyusha-L09B 9.1.0.236(C431E2R2P4) Firmware EMUI9.1.0 05015VPC

Katyusha-L09B 9.1.0.218(C431E5R1P4) Firmware 9.0.0 r3 EMUI9.1.0 05015VWK

Katyusha-L09B 9.1.0.237(C185E2R5P1)_Firmware_EMUI9.1.0_05015UKW

Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)

Katyusha-L09B 9.1.0.234(C185E2R5P1)_Firmware_EMUI9.1.0_05015UKW

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)

Katyusha-L09B 9.1.0.232(C636E2R3P1)_Firmware_EMUI9.1.0_05015WDD

Katyusha-L09B 9.1.0.226(C431E5R1P4)_Firmware_EMUI9.1.0_05015VWK

Katyusha-L09B 9.1.0.218(C636E2R3P1)_Firmware_9.0.0_r3_EMUI9.1.0_05015WDD

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)

Only Unlocked Bootloader --- Flashing By HalabtechTool --- more info here (https://bit.ly/33zK24Q)

(After flash use *Safe Mode Method To Reset Frp* https://www.youtube.com/watch?v=VL4FdfEtDnA) /// (Be Careful Some phone Dead after Downgrade The problem with emmc chip)

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)

Katyusha-L09B 9.1.0.228(C185E2R5P1)_Firmware_9.0.0_r3_EMUI9.1.0_05015UKW

Katyusha-L09B 9.1.0.213(C185E2R5P1)_Firmware_9.0.0_r3_EMUI9.1.0_05015UKW

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)

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)

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)

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)

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)

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)

Katyusha-L09B 9.1.0.205(C10E2R2P3) Firmware 9.0.0 r3 EMUI9.1.0 05015UQH

Katyusha-L09B_9.0.1.111(C461E2R2P3)

Katyusha-L09B 9.1.0.204(C185E2R4P1)_Firmware_9.0.0_r3_EMUI9.1.0_05015UKW File By

Katyusha-L09B 9.0.1.120(C185E2R2P4)_Firmware_9.0.0_r3_EMUI9.0.1_05015UKW File By

Katyusha-L09B 9.0.1.114(C185E2R2P4)_Firmware_9.0.0_r3_EMUI9.0.1_05015UKW File By