Last night, Apple released the iOS 5.1 update for the existing iDevices including the iPhone 4S, iPhone 4, iPhone 3GS, iPod Touch 3G/4G and the iPad 1 and 2. Now, just a day after its public releases, the popular iOS jailbreaking group – The iPhone Dev Team – has updated their jailbreaking utility, redsn0w, to add support for iOS 5.1.
Sadly, there is some bad news here as well. This new jailbreak is only a tethered one at the moment, which means that users will need to jailbreak their Apple iDevice every time they restart it. Secondly, this jailbreak only supports non-A5 SoC based Apple product. This includes the iPhone 3GS, the original iPad, iPhone 4 and the 3rd generation iPod Touch. The jailbreak might also be an un-tethered one if you own an iPhone 3GS with a very old bootrom. So consider yourself to be really lucky, and your iPhone 3GS really old for that to happen.
For Apple iPhone owners, who have unlocked their device using Ultrasn0w, please make sure to make a custom iOS 5.1 IPSW before proceeding to upgrade to iOS 5.1. Otherwise, you will lose your unlock.Readers interested in jailbreaking their non-A5 Apple device can find more info here.