iPhone 4S, the latest Apple gadget to take the mobile market by storm, has not yet been jailbroken. The iPhone Dev Team, who have earlier worked on untethered and tethered jailbreaks for iPhone 4 and iPad 2, have released pictures showing a jailbroken iPhone 4S running iOS 5 and Cydia installed on it.
He also posted another picture showing that root access has been achieved on a 4S device.
Well, if you are wondering when you could get your hands on this jailbreak, let us inform you right away that MuscleNerd has not given any ETA. Also there is no information as to what kind of jailbreak this one is. Is it an untethered jailbreak or a tethered one, similar to the current iOS 5 jailbreak?
Will it be a bootrom exploit that will last forever, or will it be a userland exploit such as the current iPad 2 jailbreak for iOS 4.3.3?
MuscleNerd has tweeted that this iPhone 4S jailbreak is in a very preliminary stage and lots of work needs to be done.
MuscleNerd: VERY preliminary 4S JB: http://twitpic.com/76vcp4http://twitpic.com/76vct2 (Huge missing pieces prevent public release. LOTS of work left)
In reply to a question asking if the iPhone 4S jailbreak was a userland one, MuscleNerd replied that it is. He said that the jailbreak happens when iBoot is out of the picture. For the unaware, iBoot is a stage 2 bootloader that runs in recovery mode on all iDevices. This means that the 4S jailbreak in works is definitely not a bootrom exploit.
A bootrom exploit is at the hardware level, so a jailbreak using such an exploit will be a permanent one. Unlike a bootrom exploit, a userland or browser based exploit is a temporary one because Apple can any time fix it by releasing a firmware update.