Long story short, it was a deal gone wrong and I met up with someone who was going to buy my old BB 8120 and he just ran off with it. I know the IMEI and I know the PIN. Is there anything I can do to make it not work? It's a T-Mobile BB, so I can't have the IMEI blacklisted like they can do on Sprint and Verizon. Is there anything I can do? Thanks alot.