My brother opend a bank account in my name with out my consent I closed it before he could use it,and I did not report it but now he tried to to get a cell phone with my information what should I do before he causes me serious problems can I take legal action. He's using meth and I think he needs help but he won't listen to me. I am at my witts end.

As soon as you find out he has done something report it to the company and shut it down asap just like you did with the bank acct. Also warn him that you will press charges.
How old are you?
Are you young enough to tell your parents?

The next time he needs to be arrested.

In the meantime if you notify the credit bureaus they have a procedure in place by which you can be notified any time anyone attempts to open an account in your name.

Honestly if my brother started pulling this crap with me, after I warned him once and he did it again... jail time. If you think he's on meth then he might need the time to sober up and get a reality check. I know it sounds harsh but some people need something like this to happen before they realize they are wasting their life away...