[morphios]

Is there a reason you want to access the admin panel?
If you want to re-config the router, have you considered a hard reset?

I'm not saying you should do it, as I came across one or two routers that the ISP's loaded with a custom ROM. Even after a hard manual reset, I couldn't access it and when I eventually gave them a call, they couldn't log into the router from their side since the settings were wiped.

I'm not sure if they can flash a custom ROM to a Huawei. Just mentioning it, so you can make a more informative final decision.