Who can downgrade?

Hey guys, the Dev-Team has began updates since iOS 6 went public moments ago and here’s what’s new.

 

“A few months back we released a redsn0w feature that lets you downgrade A5+ devices from 5.1.1 to anything lower (if you had saved blobs).  Unfortunately once the 5.1.1 window closes, *redsn0w’s 5.x downgrade feature will no longer work.*  Most A5 users will not be able to downgrade.  So if you’re an A5+ owner up at 6.0 when the 5.1.1 window closes, you’ll be stuck there without a jailbreak for now.” –Dev-Team Blog

 

Who can actually downgrade:

  1. A4 devices and 3GS will always be downgradable (and jailbreakable) due to limera1n.  The tethered iOS6 jailbreak for those devices (and untethered for old-bootrom 3GS) will be out when Cydia and other important pieces are all working properly.
  2. iPad2 owners who have both 4.x blobs and 5.x blobs will always be able to downgrade to those versions, even once you come up to 6.0 and the 5.1.1 window closes (don’t do that yet though!).  You need both 4.x and 5.x blobs to qualify for the downgrade even if you only wish to downgrade to 5.x
  3. iPad3, i4S (and iPad2 owners who don’t satisfy #2) will always be able to RE-restore the current 5.x OS that’s already on their device.  So if you’re at 5.1.1 when the window closes (and you’ve saved your blobs), you’ll always be able to RE-restore to 5.1.1 again.  This makes the 5.1.1 jailbreak a lot less fragile — you don’t have to worry about messing up your install with funky extensions or getting into a boot loop, because you can always RE-restore from 5.1.1 to 5.1.1 again (or from 5.0.1 to 5.0.1 again, etc).  But once you fall off the 5.x train by restoring to 6.x, you’ll be stuck there until the next jailbreak.
A new version of redsn0w will be released shortly to allow these types of downgrades. (A link will be posted at the top later)
Baseband Warning: RE-restores and iPad 2 downgrades will always end up with the latest baseband being installed. Stay very far away from any of this is you rely on an unlock
Source: http://blog.iphone-dev.org

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iOS 5 Untethered Jailbreak by Pod2g


@pod2g has something special this holiday season, an Untethered jailbreak for iOS 5. No more plugging into a computer every time you reboot your jailbroken iOS 5 device!

The video below shows Pod2g with an untethered iPod Touch running iOS 5. Please note that this is iOS 5 and not iOS 5.0.1 so you may need to downgrade or hopefully his jailbreak will support iOS 5.01 and above.  Stay tuned for more information.

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This device isn’t eligible for the requested build

Did you get the error in iTunes that your iPhone, iPad, or iPod Touch could not be updated. This device isn’t eligible for the requested build? Well it seems like many people are getting this error if they are updating to the latest version of iOS and Cydia does not yet have your SHSH files saved. Lots of people will have issues with iOS 5 beta if they have previously used TinyUmbrella

Most likely you installed the program TinyUmbrella to save your SHSH files so that you can downgrade to an older iOS firmware. TinyUmbrella has an option that automatically changes your host file so that it defaults to Cydia. In order to fix the iTunes error you are receiving you need to fix your host file or just open TinyUmbrella up again and click on the Advanced tab.  You will see the second check box say: Set Hosts to Cydia on Exit (if you need a clean restore from Apple uncheck this box).

So make sure you uncheck this box and close both iTunes and TinyUmbrella.  After that you can open up TinyUmbrella and do a clean restore in iTunes.  Doing a clean restore will always update you to the latest iOS version and will update your baseband.

As of writing this I believe Cydia has been updated to support iOS 4.3.3, so you should not see the error this device isn’t eligible for the requested build. If you still see the error just follow the above instructions or fix it manually with the instructions below.

 

You can manually fix the error “This device isn’t eligible for the requested build” by editing your host file.

Windows Guide:
1. Hit Start and in the search box type CMD and press enter.
2. CMD.exe will pop up.  Type ping gs.apple.com and press enter.
3. If you see something other than Reply from 17.112.176.11: bytes=32 you will need to edit your host file.
4. Right click on the Notepad program and make sure you select run as administrator.
5. Go to File Open and browse to C:\Windows\system32\drivers\etc\ and select hosts file.
6. Find the line 74.208.105.171 gs.apple.com and/or 74.208.10.249 gs.apple.com and Add # sign to the front of it or delete the line(s).
7. Save and exit. You will then want to run the ping command to make sure it worked.

OS X Guide:
1. Open Terminal. You can type Terminal in the search in the upper right corner.
2. When Terminal loads, type ping gs.apple.com and press enter.
3. If you see something other than Reply from 17.112.176.11: bytes=32 you will need to edit your host file.
4. Use Text Edit and open up host file in /etc/hosts
5. Find the line 74.208.105.171 gs.apple.com and/or 74.208.10.249 gs.apple.com and Add # sign to the front of it or delete the line(s).
6. Save the file as a new file to the desktop.
7. Copy the new file and overwrite the one in /etc/hosts.  It will ask you for your administrator password before it will overwrite.
8. You will then want to run the ping command to make sure it worked.

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TinyUmbrella Now Saves SHSH Files Of All iPad 2 Models

The latest version of TinyUmbrella has been updated to save SHSH files of all iPad 2 models.  Make sure you always save your SHSH files if you plan on Jailbreaking, Unlocking, or Downgrading.

Now that iOS 4.3 is out you better save your 4.2.1 SHSH files if you have not already done so.  The window is closing soon!

Download Links:

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