Apple officially released iOS 6.1.3 unto the public today, and we knew it would patch up the infamous Evasi0n jailbreak, meaning that if you update your iPhone 5 or other newer iOS device to iOS 6.1.3, you'll lose your jailbreak and won't be able to go back. However, another jailbreak method has been released, and it works on iOS 6.1.3 on older iOS devices.
The jailbreak comes to us from Redsn0w, and it only applies to iOS devices running an A4 processor. It's also a tethered-only jailbreak, meaning that you'll have connect your iOS device to your computer each time you want to boot up your device, which can be a pain sometimes. The jailbreak isn't compatible with any iPad, including the first-generation iPad (although iOS 6 isn't even available for this iPad anyway).
Of course, it's still best to remain on iOS 6.1.2 that way you don't lose your untethered jailbreak. Plus, there could be a few jailbreak tweaks that you use that may not be compatible with iOS 6.1.3, so it's always best to wait in that case as well. However, if you accidentally updated to the latest version that rolled out today, there's still hope with this Redsn0w jailbreak.
This specific jailbreak tweak only works on the iPhone 4, iPhone 3GS, and the fourth-generation iPod Touch. You'll need the Redsn0w software and the iOS 6.0 IPSW file for the jailbreak. From there, it's just a matter of opening up Redsn0w and installing the various files necessary for the jailbreak. Again, this is a tethered jailbreak, so if you need to reboot, you'll have to plug in your device to your computer and fire up Redsn0w to get it past the Apple boot-up logo.
[via Redmond Pie]