Jailbreak iPhone 4S Untethered Or Tethered iOS 5 Possibility


Earlier today, Apple revealed iPhone 4S. In this post, we shall discuss the possibility of an iPhone 4S untethered or tethered jailbreak on iOS 5.

Apart from announcing iPhone 4S today, Apple also revealed that iOS 5 will be available to public on October 12. The very first iOS 5 beta was seeded to developers on the first day of WWDC 2011 and all of the iOS 5 betas that were seeded have been jailbroken, with the exception of iPad 2. To avoid confusion, keep in mind that jailbreaking iOS 5 isn't going to be hard, it's the hardware that makes matters worse for an iPhone 4S untethered or tethered jailbreak.

The iPhone 4S has a dual-core A5 processor, one that Apple put in the iPad 2. As we all know, the A5 is not susceptible to the Limera1n bootrom exploit meaning that even if iOS 5 can be jailbroken on all other devices, it won't be possible on the iPhone 4S. For the iPad 2 there was only one jailbreak released, which was a userland jailbreak developed by Comex who now works for Apple. The downside to userland jailbreaks is that they can be easily patched by releasing a newer software version. So iPad 2 can only be jailbroken on iOS 4.3.3, as Apple fixed that userland jailbreak exploit in iOS 4.3.4 firmware.

So what does this mean for an iPhone 4S jailbreak? The fact remains that unless and until the devs dump A5 bootrom, its going to be hard to get an iPhone 4S untethered or even a tethered jailbreak. The only exception to this is that if the devs find new userland exploits that can allow iPhone 4S jailbreak, only then it is going to be possible, given the fact that Apple will easily patch the jailbreak in their next iOS 5 firmware update.

So let us break it down for you, an iPhone 4S untethered or tethered jailbreak will be possible if:

  • The A5 bootrom is dumped
  • New userland exploits are found in iOS 5
Don't pin your hopes on A5 bootrom dumping. It has been over seven months since iPad 2 with A5 processor was released and till this day no one has been able to dump A5 bootrom that would allow sure shot jailbreak for all A5 based devices. On the other hand, the Chronic Dev Team revealed earlier last month that they have found five new userland exploits that can be used for iPad 2 and iPhone 4S jailbreak. If they really have these exploits, then we just might get iPhone 4S jailbreak as soon as it starts shipping on October 14.