After jail breaker @ pod2g managed to iPhone 3G, iPhone 4 and 4S iPhone on iOS 5 to jailbreak untethered , he embarked on a jailbreak for the iPhone 4S. Through his blog he tells how it is today. Pod2g writes against problems with the processor cache to run, which may soon be resolved.
Pod2g writes:
The untether fails at the moment because I have problems with the processor cache. I'm close to a solution, but I can not figure what is happening. [...] Maybe I fast dissolving, it is a matter of luck.
Earlier this month succeeded in pod2g an untethered jailbreak for the iPhone 3G, iPhone 4, fourth-generation iPod and iPhone 1. This jailbreak is not yet accessible to everyone: they will probably be released when all IOS devices that use a 5 iOS untethered jailbreak have been.
Pod2g tomorrow promises further progress to describe.