Finally Redsn0w 0.9.7 b1 has been released to support untethered jailbreak on iOS 4.2.1. The just released beta version of Redsn0w is currently compatible with iPhone 4, iPad and iPod Touch 4G, but support for more devices is coming soon.

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Redsnow 0.9.7 uses the backup method, which the Redsnow calls “Jailbreak Monte” to achieve the untethered jailbreak state on the above mentioned idevices.

It is very important that you must already have the SHSH blobs saved on Cydia server for this purpose. Here is the official update from iPhone Dev Team:

Redsn0w 0.9.6b4 Download

Download Redsn0w. Redsn0w is one of the easiest and most popular tools to jailbreak iPhone, iPad and iPod Touch developed by the iPhone Dev team. RedSn0w 0.9.7 beta 4: Mac; RedSn0w 0.9.7 beta 3: Mac; RedSn0w 0.9.7 beta 2: Mac; RedSn0w 0.9.7 beta 1: Mac; RedSn0w 0.9.6 beta 6: Mac, Windows. Right now, the Redsn0w tool is on v0.9.15b3, and we expect updates to be released with iOS 7. Redsn0w Download Links: Redsn0w 0.9.15 beta 3; Redsn0w Mac OSX. Redsn0w Windows. Previous Versions: Redsn0w 0.9.15 beta 2 (Mac, Windows) Redsn0w 0.9.15 beta 1 (Mac, Windows) Let us know if you use Redsn0w and what you think of it. Download Redsn0w 0.9.6rc15. Update: Redsn0w 0.9.6rc16 has been released, the download links have been updated to reflect this. Mac & Windows versions are available, these are direct download links: Download now (Mac) Download Now (Windows) If you aren’t sure what to do, follow our guide to jailbreak iOS 4.3.3 using redsn0w. Redsn0w 0.9.4 Mac Virustotal Scan Redsn0w 0.9.4 Mac License: iPhone Dev-Team. While Jailbreaklibrary does redistribute (Archive) software such as Redsn0w, I don’t modify it or resale the software because I believe in keeping jailbreaking Alive!

Update #1: We’re about to release the first beta using this new “backup method”, which redsn0w calls “Jailbreak Monte”. Here are some important points:

• This is a beta tester program. It’s not a general release! Things can go very wrong, so please don’t even consider testing if you have pictures or other media on your device that you haven’t backed up!
• For the same reason, please don’t participate if you rely on the ultrasn0w carrier unlock. Wait for the final version!
• Until we fix some sandbox issues with bluetooth, the bluetooth functionality is disabled.
• This very first beta1 is limited to iPhone4, iPad, and iPod touch 4G.
• Cydia must have your 4.2b3 SHSH blobs saved on file. (As we approach a general release, we’ll provide a way to let you use locally saved hashes too).
• You must already have the usbmuxd software installed and running on your Mac (this requirement will eventually go away too). The correct invocation of the relay is just as that page says: “./tcprelay.py -t 22:2222”.
• Please leave all feedback in the comments below (we really need your feedback to help develop it into a stable release!)

Download Redsn0w 0.9.7:

• Download Redsn0w 0.9.7 b1 for Mac
• Windows users will have to wait few more days to get the redns0w for their OS.

Stay tuned to this blog for complete step by step guide to convert the tethered jailbreak into untethered jailbreak with Redns0w.

Download RedsnOw 0.9.9 b9. The iPhone Dev-team’s spokesman MuscleNerd has announced the released of Redsn0w 0.9.9b9 for Windows and Mac OS X bringing many new features. RedsnOw 0.9.9b9 still tethered jailbreak for iPhone 4, 3GS (new bootrom), iPod touch 4G, 3G and iPad 1, and only untethered jailbreak for iPhone 3GS (old bootrom). Redsn0w 0.9.9 b9 bringing iOS 5.0.1 support (e.g. no need to point redsn0w at iOS 5.0 ipsw).iPhone Dev-team implemented new amazing feature, Redsn0w 0.9.9 b9 bringing the new feature that came in Notcom’s TinyCFW which allows iPad 2 (GSM / CDMA) users who have 4.3.3 SHSH blobs to downgrade from iOS 5.x to 4.3.3. But the interesting point in Redsn0w 0.9.9 b9, that it doesn’t require lots of RAM

What’s New on Redsn0w 0.9.9 b9:

Redsn0w 0.9.15b3 Download

• native support for 5.0.1 (no need to point redsn0w at 5.0 IPSW or use command-line args). Support automatically extends to all of redsn0w’s various functions: “Jailbreak”, “Just boot”, “Fetch blobs”, “Stitch blobs”, “Recovery Fix”
• iBooks fixed in 5.0 and 5.0.1. This is a targeted fix that doesn’t remove entire sandbox mechanism. 5.x users already using redsn0w “Just Boot” can just use the new version without redoing entire jailbreak again
• 3GS old-bootrom owners can now create custom IPSWs without blobs
• ultrasn0w compatability update (i.e. same baseband requirements) for 5.0.1 will be available on Cydia Monday
• support for newer 8GB iPhone4 (which until now had problems with “Fetch blobs”). Thanks to @JKjeepnJeff for loaning us one of these newer i4 units for testing!
• allows Windows users (not just OS X users) to use the “Custom” button to create IPSWs without baseband updates
• accommodates APTickets in 5.x (until next Apple countermove). APTickets are crypto-verified before submitting to Cydia, just like the main blobs. Cydia server support for sending back the APTickets is upcoming. For now, use stitched IPSWs for 5.x. Due to APTickets, stitched 5.x IPSWs now require user to start in “Pwned DFU” mode
• Support added for stitching 4.x blobs to iPad2-GSM IPSWs. Similar to @notcom’s TinyCFW but doesn’t require lots of RAM or a TSS-assisted restore. Won’t work for iPad2 5.x blobs (or iPhone4S at all) until a bootrom-level exploit is out
• top line now shows whether (and where) a redsn0w update is available, or if the version being run is the latest. Uses DNS TXT record to alleviate any concerns about snooping
• no 5.1 beta support at this time (major apps like Cydia are not yet compatible)
• @pod2g has been doing a great job porting his 5.x untether…check his blog for updates!
• Owners of newer 3GS iPhones must not flash the iPad baseband. The iPad baseband will not work on 3GS iPhones built later than 2011 week 35.

Download for windows: https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.9b9d.zip?attredirects=0&d=1

Download for Mac: https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.9b9d.zip?attredirects=0&d=1

All links are updated!!

Jailbreaking iOS 5.0.1 using Redsn0w 0.9.9b9

These instructions are the same for all compatible iOS devices and from running redsnow in Mac OS X or Windows:

1. Download redsn0w 0.9.9b9d: Mac OS X or Windows
2. Launch Redsn0w and click on “Jailbreak”
3. Put the iOS device into DFU mode by holding down the power button for 3 seconds, then start holding the Home button as well for an additional 10 seconds, then release the Power button but continue to hold the Home button for another 15 seconds
4. Wait while the jailbreak is installed, this will take a few minutes. When finished you will see a “Tethered Jailbreak” popup window reminding you of the tethered status and the iPhone screen will no longer display gibberish text
5. Still in Redsn0w, click back to the first screen and click on the “Extras” button
6. Click on “Just Boot” and put the device back into DFU mode again the same way as before, or follow on screen, then let the iOS device boot tethered

Redsn0w Download

Your iOS device will now boot jailbroken and is free to use Cydia.

Source: http://www.limera1n.cc and osxdaily.com