How To Use Redsn0w 0.9.11b1 To Downgrade iPhone 4S, iPad 3 & iPad 2 [ Download ]

Alright, in this post we brought a very important news for jailbreakers and our fans specially who have A5 devices as iPhone 4S, iPad 3 and iPad 2. For who lost their jailbreak after upgrading their devices to iOS 5.1.1 or iOS 5.1 they can downgrade to older firmwares and enjoy the untethered jailbreak again with new version of Redsn0w. Few hours ago, MuscleNerd has

announced the release of Redsn0w 0.9.11b1 which will allow users who have A5 devices to downgrade iPhone 4S, iPad 3 and iPad 2 to enjoy the untethered jailbreak once again. As most of you know that old devices as iPhone 4, 3GS, iPod touch 4G, 3G and iPad can always downgrade with SHSH blobs to previous firmware versions due to geohot’s limera1n exploit. Download Redsn0w 0.9.11b1 for Windows and Mac from the links below.

What are new features of Redsn0w :

Starting with redsn0w version 0.9.11b1, those with newer devices (iPad2, iPad3, and iPhone4S) can join the downgrade fun too! In a radical departure from previous versions of redsn0w, it now directly supports restoring IPSWs to your device. The first use of this new feature implements a hack that allows A5 downgrades without a bootrom-level exploit.

Where to find the new downgrade and restore features :

The new feature is at Extras->> Even More->> Restore

How to downgrade your iPhone 4S, iPad 2 & iPad 3 :

You cannot downgrade without the personalized SHSH blobs for your device at that lower firmware. You need to have fetched those blobs while the signing window was open, using either Cydia’s built-in TSS@Home feature, or with TinyUmbrella. The new Restore screen of redsn0w lets you choose either the remote blobs or local ones (for the earlier firmware). If you don’t know where TinyUmbrella put your blobs, TinyUmbrella has a button that will show you (copy them out of that folder and feed them to redsn0w).

Can I use the new Redsn0w if I’m relying on unofficial unlock or SAM ?

The A5 downgrade method actually updates to the latest firmware before downgrading to the earlier one. This process updates your baseband to whatever is newest. DO NOT USE THIS METHOD IF YOU RELY ON UNOFFICIAL UNLOCKS of your iPhone4S. Those who used the temporary SAM technique to unlock their iPhones to specific SIMs shouldn’t be affected by this baseband update.

The new feature may be stopped by Apple:

This method can be fixed by Apple with a firmware update. It’s a (pleasant) mystery why they haven’t fixed it yet, because reverse-engineering of the restore ramdisk indicates they do know about it. It’s possibly too niche to bother to fix right now.

Very Important notes regarding Redsn0w 0.9.11 b1:

This update involves a bunch of new redsn0w code. We recommend sticking to the previous version 0.9.10b8b unless you’re specifically using this new feature, until all the bugs are worked out! (Note: If redsn0w gets stuck at the “Waiting for device” stage for more than 30 seconds, you’ve hit a pesky GUI bug…that will be fixed in an upcoming version!)