There are tools that you can use to jailbreak your iPhone 4S, 4 3G and the iPad 2. After jailbreaking and unlocking your device, it will then have the Cydia app installed and this allows users to find along with install software which includes apps and customization for the interface. Cydia is the main 3rd party platform for iOS.
How to jailbreak your iPhone fast and safely
The easiest way to jailbreak your iPhone at the moment is using 3rd party services given that it lessens the risk of a brick. EasyUnlockPhone.net is one example of an iPhone jailbreaking service and has broken more than 250,000 iPhones “out of jail” with a simple solution. The process of unlocking your iPhone is very easy and it is available for all models of the iPhone. Their software guarantees easy to use untethered jailbreak and unlock for all iPhones. Best yet, the whole process generally takes just 5 minutes.
One huge advantage to jail breaking your iPhone this way is that the process is reversible. This means that there will be no evidence that the handset has been unlocked. Users can now improve their experience with the iPhone without risk and discover its full potential.