The search for an untethered jailbreak for Apple's latest mobile Operating System, iOS 5, may be over. The FastUnlockiPhone.com team claims to have released a jailbreak tool for an untethered jailbreak iOS 5 on iPhone 4. It has been named FastRa1n v5.0.
The new version of FastRa1n is said to be capable of performing an untethered jailbreak on every Apple device, aside from the iPad 2 and iPhone 4S. It allows you to unlock your device and add tons of little apps and tweaks through Cydia.
To get the untethered iOS 5 jailbreak, visit the official website of FastUnlockiPhone.com team and download the latest version of FastRa1n. In addition, the FastRa1n v5.0 is an untethered userland jailbreak, which means that it allows you to jailbreak a iPhone 4 running on iOS 5 via Safari browser, just like JailbreakMe 3.0.
As far as features go, untethered jailbreaks are similar to tethered ones. However, there is a big difference - tethered jailbreaks require you to reconnect the device to a Windows or Mac computer each time it needs to be booted. It may be annoying if the battery dies, as the device has to be reconnected to recover the jailbreak application. An untethered jailbreak, on the other hand, allows the device to be powered without computer assistance.
What is Cydia?
Cydia is a third-party software application for iOS that enables a user to find and install software packages (including apps, interface customizations and system extensions) on a jailbroken iPhone, iPod Touch or iPad. After being installed, it will break a lot of iOS features like Apple's official apps and third party apps.
Cydia provides a graphical user interface to jailbroken iOS users using APT (Advanced Packaging Tools) repositories to install software unavailable on the App Store. Some of the packages available in Cydia are standard applications. However, most are extensions and modifications for the iOS interface and for apps in the iOS ecosystem. Since these software packages run on jailbroken devices, they can offer functionality outside the span of normal applications.