Error code 37 when trying to unlock - Speed Wi-Fi NEXT W02

[erneweber]

Hello,
I am getting this error when trying to unlock my modem Huawei Speed Wi-Fi NEXT W02 (HWD33). How can I update firmware if I am not in Japan now?

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DC - Unlocker 2 Client 1.00.1442

Detecting modem :

selection :
manufacturer - Huawei modems
model - Auto detect (recommended)

Found Applications port COM4

Found modem : Speed Wi-Fi NEXT W02
Model : Unknown Huawei modem (AuthVer 4)
IMEI : 869342020043382
Serial NR. : 43YDW15C29003375
Firmware : 21.411.03.00.824
Dashboard version : WEBUI_14.100.03.38.04_RE5
SIM Lock status : Locked (Card Lock)
Wrong codes entered : 0 (unlock attempts left : 10)

================================================== =================

Check account status

User : erneweber
Credits left : 7

Activated features:

Software debugger

Unlock Unknown Huawei modem (AuthVer 4) (869342020043382) cost 7 cr

================================================== =================

Unlocking, please wait ...

AT command error

Error code 37

unlock failed !

[Valdemaras]

Sorry, but we do not have info regarding firmware upgrade/downgrade options.