Somebody that knows for sure how to do this, I could use some help.

I have a manager's line from Cingular that I've been using a Blackberry on. I had my Blackberry account set up through the Web Client, but never got the actual BB feature added to the line. Now I'm turning the handset in for a PTT handset. I want to be able to sell the BB as used to a new customer, but my existing BB account has to be cancelled first. Does anyone know how to cancel an existing Blackberry email account? I assume it can be done through customer service, but is there any other way?

Thanks in advance for any help anyone can give me! 😁