After getting an iPhone or iPad, first thing users usually hear is Cydia and second will be Installous. Cydia is app for iOS that enables user to find and install software packages (apps, interface customizations, system extensions) on a jailbroken (factory unlocked) iPhone, iPod Touch or iPad. Most of the apps available through Cydia are free but it also includes apps for sale through the Cydia Store. Most of these packages focus on providing customizations and modifications (tweaks) that can only run on jailbroken devices. To install Cydia you must jailbreak your iDevice. Here is how to jailbreak iPhone and install Cydia in simple way.
Apple has released iOS 5 beta 3 for iPhone, iPad and iPod touch and Apple TV and the new iTunes 10.5 beta 3. Here is how to jailbreak iOS 5 beta 3. It was said that Apple may patch jailbreak exploit in iOS 5 beta 3. But we gonna instruct here how you can jailbreak iOS 5 beta 3 using redsn0w. The same version of redsn0w that can jailbreak iOS 5 beta 1, can also jailbreak iOS 5 beta 3. Using Redsn0w 0.9.8b1 you can jailbreak iOS 5 beta 3 but it is a tethered jailbreak. Tethered jailbroken device requires it to connect to a computer in order to boot tethered on every reboot of device. Untethered exploit usually expires in a couple of weeks. Here is how.
Apple has released iOS 4.3 for iPhone 4, 3GS, iPod Touch 4G, 3G and iPad 2, 1 with a lot of new features. You can download iOS 4.3 via links below according to your iDevice requirement.
The Chronic Dev Team released Greenpois0n RC5 to jailbreak iOS 4.2.1 completely untethered for iPhone 4, 3GS, 3G, iPod Touch and iPad without requiring SHSH blobs for iOS 4.2b3. Download Greenpois0n RC5 to Jailbreak iOS 4.2.1 and use following guide to jail break iOS 4.2.1.