Hello to you all. I found a brand new ps3 slim 160gb (not super slim) now I know that there are two different types of cech numbers for this specific model. If its cech-2504a it come with firmware 3.50 with can be hacked. But if its cech-3004a it comes with firmware above 3.55. And I couldn't sell it for a good price so i can buy a wii u. My question is can I know the cech number right from the box?