These contents can be downloaded via installers like Cydia.Even tough the iPhone(or other device) is jailbroken,you can still use the official Apple features such as the iTunes or the AppStore. Jailbreaking is not to be confused with SIM unlocking,which means that the phone will accept any SIM card. According to Apple, jailbreaking voids the Apple warranty on the device. However,it can be quickly fixed by restoring the device on iTunes.
The first jailbreaking method was discovered on July 10,2007.A month later,the first third-party game was released for the iPhone and iPod Touch.The second method was found three months after the initial method,and it determined Apple to start a pursuit against the hackers that were exploiting the security holes. All upcoming methods of jailbreaking were achieved due to the contribution of the Italian hacker Zibri who found the most important key inside the iPhone. Near the release of the iOS 2.0,a hacker group named iPhone Dev Team created a jailbreaking program named Pwnage Tool that used a graphical user interface.
It was compatible to all 2G,3G iPhones,as well as all iPod Touches available at that moment.The Pwnage Tool is available for all iOS version since iOS 2.0,including iOS 4.1.The italian hackers's discovery was made sometime around February 2008.In 2009,iPhone Dev Team started working on the jailbreaking of the iPod Touch or 2G.The iOS 3.0 was released on April 17 2009 but it remained unbroke three months until the release of Pwnage Tool 3.0. September brought the iOS 3.1 which once again disabled jailbreaking,and it was followed by a new release of the Pwnage Tool,which was able to jailbreak all iPhones except for the iPhone 3G.The iPod Touch remained unbroken a month,until the release of George Hotz's software called "blackra1n".
Apple released iOS 3.1.3 which once again blocked jailbreaking, but most iPhones and iPod Touches can be downgraded.The iPhone 3GS and the iPod 3G however,can only be downgraded if the user saves the SHSH blob of his device.In April 2010,George Hotz announced that he was working on a new exploit called limera1n,and also opened a domain called limera1n.com.However,after several months,with no exploit on the table,George announced his retirement from the jailbreaking scene.Some believe that limera1n was a fake.
On June 21,2010,Apple released iOS 4,but hours later,the iPhone Dev Team came up with redsn0w.The days that followed brought updated versions of Pwnage Tool and snowbreeze from iPhone Dev Team,which allowed users to jailbreak the iPhone 4,the iPhone 3GS,and the second generation of iPod Touches.However,original,there were no exploits that could jailbreak the iPhone 4.