I bought a new ntel mifi on Thursday, registered my line and subscribed for unlimited data and up until now, it is not working, who has had this kind of problem? How long does it take to resolve because I need it for my official work.

I guess they are having issues to activate new lines at the moment. I know someone that bought their SIM that same Thursday and it was on Sunday morning the line became active. You may have to be more patient with them.