Apple is smart which is why it has been taking longer and longer to jailbreak the newer versions of iOS. However, the Dev team has been able to find a workaround to jailbreak and unlock. It’s more of a cat and mouse game between these two.
Since Apple cannot control the jailbreaks and unlocks Apple is taking that war to a new level by restricting access to apps on jailbroken devices. For example, recently they had crippled the iBooks apps for jailbroken devices and users who had jailbroken their iPhone were not able to access the books they had legitimately purchased.
Mind you, jailbreaking and unlocking your device is legal, but Apple can use software to restrict such devices. So what now? Well, Dev Team to the rescue again. The Dev Team, who work for free, just managed to overcome the iBooks issue with PwnageTool 4.2.
The fix was put in place by @comex and @pushfix who managed to fix the issue with the latest jailbreaking tool, allowing users to continue reading book they purchased through the app store.
So if you have been facing an issue with the iBooks software, head over to the Dev Team blog to download the latest PwnageTool 4.2 bundle to jailbreak and unlock your iPhone, iPod Touch and iPad and start using iBooks again. These updates will also be made available through the Cydia app, so you can just update the app and start using iBooks app without having to restore and jailbreak your device again.