By Sumit Passary | Oct 21, 2012 01:09 PM EDT
The iPhone Dev Team announced an update for its latest iOS jailbreaking tool Redsn0w. iPhone 4, iPhone 3GS, and iPod Touch 2G users can now downgrade from Apple's latest iOS 6 platform to iOS 5 using the latest Redsn0w 0.9.15b2 tool.
The latest update brings important bug fixes to iPhone 3GS with older boot ROMs and incorporating an untethered jailbreak support for iPhone 3GS users with a re-restore option. The update also features the new direct restore capability for pre-A5 devices, which allows users to downgrade the device from iOS 6 to any iOS 5.x firmware, "without dealing with host files, stitching, Pwned DFU, iTunes or other complicated methods of downgrading that were needed in the past," reported International Business Times (IBTimes).
The Prerequisites as noted by IBTimes are as follows:
"SHSH blobs for the iOS 5.x.x firmware (the version of the firmware you want to restore) must be saved by using TinyUmbrella or the iPhone must be jailbroken on iOS 5.x.x with Cydia launched at least once. This is to ensure that caching of the SHSH blobs is enabled on its servers."
The downgrade procedure restores an iPhone to iOS 5.x.x, so a user will have to set up the iPhone from backup. The restore from backup feature supports only iOS 5.x.x or lower compatible backups. A user will also have to download the latest version of Redsn0w - 0.9.15b2 (Windows / Mac)
A step-by-step guideline for jailbreaking the iPhone 4 or 3GS is as follows:
Step1: Create a folder on the desktop and name it as "Pwnage".
Step 2: Copy the downloaded Redsn0w .zip file to the Pwnage folder on the desktop.
Step 3: Download the firmware you want to restore your phone to (from here, courtesy iClarified.com) and copy it to the Pwnage folder.
Step 4: Extract the Redsn0w zip file to the Pwnage folder.
Step 5: Right-click on the Redsn0w application-file in the Redsn0w folder and select "Run as administrator" from the pop-up menu.
Step 6: In the main menu click Extras and then on the Even more button. Now click on Restore and then IPSW. Finally, choose the IPSW firmware that you want to restore your phone back to from the pop-up window and click open.
Step 7: Redsn0w prompts you to verify if you want to prevent baseband update process. Click Yes to confirm as this will preserve your older baseband settings.
Step 8: Next, Redsn0w will notify you that Pwned DFU mode is required for restoration process. Click OK.
Step 9: Power off your iPhone and connect it to the computer then click the Next button. Follow the onscreen instructions in Redsn0w to enter DFU mode. Press and hold down the Home button and the Power button on the iPhone for 10 seconds. Release the Power button; but, continue holding the Home button until Redsn0w recognises the device.
Your phone will now have limera1n, jailbreak utility.
Redsn0w checks Cydia to confirm if you have the correct version of SHSH blobs saved. If the blobs fail to get detected automatically in Redsn0w, try clicking the Remote button for a rescan or click Local button to search for blobs on your computer.
Redsn0w now prepares a system restore image and your device will be restored to the new firmware.
Once the device is restored, you will get a Restore successful message.
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