Total noob at this, I just bought this phone 3 days ago and having a hell of a time with it. trying to read and find and catch up on all the posts about this device with sprint and whether it is able to be jailbroken or not
At the present moment no iPhone 4S is jailbreakable. They say they are working on it and the ipad 2 but have not released anything yet. You will just have to wait and check back until they release a jailbreak.
So to recap
<iPhone4 ,ipad1 ,ipod= jailbreakable
>iPhone4S ,ipad2= non jailbreakable as of now.