its requesting for 10 digits my huawei E3531 serial no 867424021746379 i got 8 digits
as i know all huawei modems 8 digits code . try this
IMEI: 867424021746379
Unlock (V1): 44171736
Unlock (V2): 14940117
Unlock (V3): 30936953
Flash: 64758765
I have tried all but its not cracking