been with sprint for a while but planning to leave within the next few weeks, i was reading about the Iphone say I get a 3G Iphone with a 2 yr contract with ATT. Whats the difference between unlock and jailbreak? and if I do that will it effect my contract cause I am the type that like to get free movies, games, ect..., will I get caught doing that under contract?or will I need to jail break or unlock if I am under contract? what are the best free websites or softwares for doing that?