Unless their chipset has already been exploited and jailbroken on a previous device, it takes a lot of time for the iOS jailbreaking community to come with a jailbreak for a new iOS device. The iPhone 4S and iPad 2, both of which are based on a still (bootrom) unexploited dual-core A5 chip, haven’t received a jailbreak for iOS 5 yet, but it appears that they’ll be getting one soon as a certain eminent iPhone hacker has let us know that the iPhone 4S Jailbreak
has already been jailbroken with a jailbreak for iPad 2 in the works.
As you can see from MuscleNerd’s tweet, the jailbreak is “very preliminary” and is still some time away from a public release. There are no ETAs for this so we expect you all to show a little patience and let the Dev Team do their work.As of writing, all jailbreaks currently available for iOS 5 (except for iPhone 3GS with old bootrom) are tethered i.e.iPhone 4S untethered Jailbreak
users have to be connected to a PC to reboot their device into jailbroken state. While the community did come up with a SemiTether solution which allowed jailbreaking enthusiasts to reboot into their jailbroken iOS 5 device with limited functionality, it is the untethered jailbreak which we’re waiting for...