Currently I am using the number of other person name (as supplimentary line) who is also the principal for the account. But the owner is always late in due payment and my number keep barred to due late payment on his side. I decide to separate and reregister the number under my name but the owner doesn't seem care about this and uncontactable.

Can I change the ownership of my number and change my plan?

yeah.. i did chat with online chat..
they said still need to come with the owner to change it.

I just hoping if there will be some other way to do it. Besides, I don't care if i need to pay the balance if needed as long I can get the number.