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 - Kirin710_P1_V2
2026-06-17 11:46:27.069 Connecting to server...
2026-06-17 11:46:27.785 Connected!
2026-06-17 11:46:29.528 Find device COM32, handle 11480
BOOTLOADER selected to update:Kirin710_P1_V2
downloading file Kirin710_P1_V2_0.dtwork...
downloading file Kirin710_P1_V2_2.dtwork...
downloading file Kirin710_P1_V2_3.dtwork...
downloading file Kirin710_P1_V2_4.dtwork...
downloading file Kirin710_P1_V2_6.dtwork...
2026-06-17 11:48:06.585 Waiting for device REMOVAL/INSERTION...
2026-06-17 11:48:10.953 Device ready!
2026-06-17 11:48:10.963 Connecting to server...
2026-06-17 11:48:11.706 Connected!
2026-06-17 11:48:14.166 Unlocking bootloader...
2026-06-17 11:48:14.171 Reading Certify data...
2026-06-17 11:48:15.021 Reading Certify data success!
2026-06-17 11:48:15.027 Signing Certify data...
2026-06-17 11:48:16.387 Reading info...
2026-06-17 11:48:19.402 Read NV FAIL! 
2026-06-17 11:48:22.576 IMEI certificate saved to E:\HCU\HCU_0382\Backup\certificates\cert_864963047449099_6000.bin
2026-06-17 11:48:22.592 IMEI certificate saved to E:\HCU\HCU_0382\Backup\certificates\cert_864963047479104_6000.bin
2026-06-17 11:48:22.598 IMEI certifiacate backup success!
2026-06-17 11:48:23.618 Done!

Fastboot provided info:
CPU: kirin710
Model: MAR
Firmware: MAR-L21A 10.0.0.470(C431E14)
SN: HYJNW18A27001862
PCB SN: NW5HUD18B4020984
Theme color: black
FBLOCK: 0
Bootloader FB lock: unlocked
Bootloader User lock: locked

Found signed IMEI:
Key: 0x6000
IMEI1: 864963047449099
IMEI2: 864963047479104
SIM NW_LOCK status: UNLOCKED

Found OEM data:
Version limitation: OFF
SIMCARDMODE: double
Bootloader User lock: locked
Phone ID: E53876479B9495B
2026-06-17 11:48:29.221 Repairing...
2026-06-17 11:48:29.243 Unlocking restrictions...
2026-06-17 11:48:29.600 Unlock restrictions success!
2026-06-17 11:48:29.611 Erase FRP...
2026-06-17 11:48:29.644 Erase FRP success!
2026-06-17 11:48:29.656 Done!

Memo log saved to E:\HCU\HCU_0382\Logs\20260617_114829_HCU_XloaderRepair_E53876479B9495B.txt