If you are someone who's keeping in the loop of all things iOS, then there's a good chance that you know that Apple just released the sixth pre-release version of iOS 5 a few days ago. The final build of iOS 5 is expected to launch next month, and with the release of iOS 5 beta 6, we have taken yet another step closer to the system's final build release. And of course with every iOS beta, one has to wonder if jailbreaking is possible. Well the iPhone Dev-Team just updated Redsn0w so that it can be used to jailbreak iOS 5 beta 6.
This version of Redsn0w is dubbed as 0.9.8b6 "Jetblue edition", which according to iPhone Dev-Team frontman MuscleNerd, shouldn't be too different from previous versions or the final 0.9.8 version for that matter. And of course, those who are expecting an untethered jailbreak with Redsn0w 0.9.8b6 is going to be disappointed. This is still a tethered jailbreak and most likely we won't be seeing an untethered solution until the final build of iOS 5 is released.
Straight from the iPhone Dev-Team blog:
We’ve released redsn0w 0.9.8b6 to jailbreak iOS5 beta6 (point it directly at the beta6 IPSW). Two important notes about this version: (1) Please let your device boot normally to IOS5b6 and do a clean shutdown (slide to power off) before jailbreaking. (2) Boot logos have intentionally been disabled for now, so you’ll see a black screen on tethered boots (you can re-enable logos or verbose boot with command-line options if you really want them back).
Due increased sensitivity to abrupt filesystem shutdowns in IOS5b6, it’s very important that you do a clean shutdown before running redsn0w.
So there you have it. 0.9.8b6 is a minor update so that it properly works with the latest iOS beta. There have been reports from users that using 0.9.8b5 to jailbreak iOS 5 beta 6 has caused stability issues to their devices. So if you somehow used a previous version of Redsn0w to jailbreak your device, we recommend you to restore your device again and use this version of Redsn0w instead to ensure a stable and clean jailbreak. Jailbreaking iOS 5 beta 6 using Redsn0w 0.9.8b6 should be the same process as previous versions (should point to beta 6 IPSW when asked), so refer to our Redsn0w guide if you need help.
If your device sports a baseband unlock, then you might want to stay away from this or from installing iOS 5 in general because there's a high chance that you will lose your unlockable baseband. Redsn0w 0.9.8b6 is intended only for developers who are working on jailbroken apps. There are far too many bugs and issues that are present not only with this jailbreak but with iOS 5 itself, so unless you know absolutely what you are doing, we wouldn't recommend installing or jailbreaking iOS 5 beta 6.
Again, pretty much like previous versions of Redsn0w for iOS 5 betas, this is a tethered jailbreak. Which means if your device gets shutdown or reboots, it becomes unusable until you run it through Redsn0w and perform a tethered boot.