u need to use quickpwn. cydia is like an appstore for a jailbroken iphone. icy is part of the jailbreak i believe. i paid some guy $15 to do mine and he showed me how to do it. basically hookd his to his computer and a ran a program. simple as that. go on CL and type in jailbreak. alot of people offer the service for cheap and know what ther doing