Wirelessly posted (8820)
You need to contact the previous owner, if possibel, and have them remove the blackberry from their account. If that's not possible, you might be able to get the carrier to free the blackberry if you are lucky.
There's an article at blackberryfaq.com that may help. It is meant to be used before buying, but it will give you a heads up about other potential issues. See http://www.blackberryfaq.com/index.p...Berry_off_eBay