I am a fool when it comes to these type of things. I already matched the frequency and the types of blackberry and what Metro PCS (T-mobile) supports and for the most part it matches. My concern is that I would have to cut my SIM and fit it into a the blackberry and find out it doesn't work, then I would have wasted not only money on the phone but also the fact that I need a new SIM for my old phone. I don't understand how that IEMI and other stuff is needed to activate. Just simply buying an unlocked phone is not enough? Thanks.