As is the case with all beta releases of Apple software, this upgrade is only available to registered developers who are enrolled in the iOS development program. The good news that quite often comes with these beta releases is that those same developers can also enjoy a tethered jailbreak and for iOS 6.1 beta 4 this tethered jailbreak comes thanks to Redsn0w.
This latest iOS 6.1 beta 4 release can be jailbroken using Redsn0w and will immediately be of benefit to those who have installed or are planning to install the update on their A4 device or older. Compatible devices for this tethered jailbreak include the iPhone 4, iPhone 3GS and the fourth generation iPod touch. All of these devices are susceptilbe to the Limera1n exploit. Those who own the iPhone 5 or fifth generation iPod touch will have to wait until the dev teams come up with a solution that will provide a tethered or untethered jailbreak.
Althought a large number of people have already upgraded their iOS devices to an iteration that is not currently supported by this jailbreak, it is always nice to know that those who are clutching onto older Apple hardware will always have at least a tethered jailbreak solution no matter what. This is all thanks to the historical bootrom exploit which Apple cannot patch due to its hardware nature.
Redsn0w hasn't released an official update for this fourth beta release, but if you point the software to the older 6.0 firmware file it will still work for this latest beta version. We have to point out, that Redsn0w will only provide a tethered jailbreak for A4 devices and this means that all compatible devices that are jailbroken on iOS 6.1 beta 4 will need to be connected to your PC or Mac and have Redsn0w run again to reboot them into a jailbroken state if they ever power down.
