I am purchasing an IPhone 4 S that belongs to a friend of mine. If possible, I would like to switch carriers because I can get more value and a better data package. Will Sprint unlock a IPhone that was originally purchased through Verizon? Thanks in advance for any advice you can give me. Please understand that I don't feel qualified to undertake the process of jail breaking on my own. I am just beginning to learn my way around my IPod Touch.