Before operation turn phone to TestPoint mode:
Turn off phone, then short TestPoint on phone pcb
and plug USB cable
Wait for device "HUAWEI USB COM 1.0" in Ports


Repair
Unlock downgrade/customization limitations
FRP and Factory reset
Selected Cpu/Bootloader - Kirin659_Hi6250_T0_A8.0_V2
2026-05-12 13:19:06.228 Connecting to server...
2026-05-12 13:19:06.965 Connected!
2026-05-12 13:19:08.638 Find device COM93, handle 11508
BOOTLOADER selected to update:Kirin659_Hi6250_T0_A8.0_V2
2026-05-12 13:19:09.290 Downloading bootloader...
FILE TO download: Kirin659_Hi6250_T0_A8.0_V2_3.dtwork
downloading file Kirin659_Hi6250_T0_A8.0_V2_3.dtwork...
2026-05-12 13:19:11.212 Success
FILE TO download: Kirin659_Hi6250_T0_A8.0_V2_4.dtwork
downloading file Kirin659_Hi6250_T0_A8.0_V2_4.dtwork...
2026-05-12 13:20:12.471 Success
2026-05-12 13:20:12.480 Bootloader write success!
2026-05-12 13:20:12.503 Waiting for device REMOVAL/INSERTION...
2026-05-12 13:20:17.025 Device ready!
2026-05-12 13:20:17.034 Connecting to server...
2026-05-12 13:20:17.770 Connected!
2026-05-12 13:20:19.691 Reading info...
2026-05-12 13:20:24.099 IMEI certifiacate backup success!
2026-05-12 13:20:25.227 Done!

Fastboot provided info:
CPU: hi6250
Model: RNE-L21
Firmware: RNE-L21 8.0.0.355(C185)
Vendor: hw
Country: meafnaf
MEID:  00000000000000
SN: FFY5T18410020008
PCB SN: 5T4QGL1849026235
WIFI MAC: AC075FEADE6E
BT MAC: AC075FEAEC7F
Theme color: black
FBLOCK: 1
Bootloader FB lock: unlocked
Bootloader User lock: locked

Found signed IMEI:
IMEI1: 869676032527183
IMEI2: 869676032563196
SIM NW_LOCK status: UNLOCKED
SIM NS_LOCK status: UNLOCKED
SIM SP_LOCK status: UNLOCKED

Found NV data:
Modems: 2
IMEI1: 869676032527183
IMEI2: 869676032563196
PESN: 00000000
MEID: 00000000000000

Found OEM data:
IMEI:869676032527183
IMEI1:869676032563196
MEID:00000000000000
Model: RNE-L21
Firmware: RNE-L21 8.0.0.355(C185)
Rescue: rescue:RNE-L21C185B142
Vendor: hw
Country: meafnaf
Version limitation: ON
SIMCARDMODE: double
Bootloader User lock: locked
Phone ID: 507B5E439FEE8E9
2026-05-12 13:20:29.650 Repairing...
2026-05-12 13:20:29.676 Unlocking restrictions...
2026-05-12 13:20:29.709 Unlock restrictions success!
2026-05-12 13:20:29.719 Erase FRP...
2026-05-12 13:20:29.752 Erase FRP success!
2026-05-12 13:20:29.765 Done!

Memo log saved to E:\HCU\HCU_0382\Logs\20260512_132029_HCU_XloaderRepair_507B5E439FEE8E9.txt