How To Perform Untethered Jailbreak On Your iPhone 4/3GS Without Updating Baseband Using Redsn0w For iOS 5.0.1 [Mac/Windows]

News | Wednesday December 21 2011 5:48 PM | Comments (0) Tags: , , , , , , , , , ,

, which finally allows iPhone 4 GSM, iPhone 4 CDMA and iPhone 3GS users to perform an untethered jailbreak.
In this guide, we will take you through the step by step procedure to jailbreak iPhone running 
 without updating the baseband using Redsn0w.
Here are some important points to note before you proceed.
iPhone 4 and iPhone 3GS users who are interested in unlocking their iPhone using Ultrasn0w – a software method. iPod touch 4G and iPod touch 3G users can checkout
, while iPad users can checkout
This guide is meant only for GSM iPhone users.
This guide is only applicable if you haven’t upgraded to iOS 5.0.1.
Redsn0w 0.9.10b1 supports an untethered jailbreak.
 and at your own risk.
 before upgrading to iOS 5.0.1 so you can downgrade to the current version if required.
Please do not forget to backup your iPhone before you proceed. You can 
 for instructions on how to backup your iPhone .

 from Cydia to take a backup of all the jailbreak apps and tweaks so you can reinstall them easily after successfully jailbreaking your iPhone rather then installing them individually. However, since you’re moving from iOS 4.x to iOS 5, it may be a good idea to reinstall the jailbreak apps to avoid compatibility issues.
After the jailbreaking process is complete, do not forget to checkout our article on 
Please ensure you are running latest version of iTunes i.e. iTunes 10.5 or later.
Download Redsn0w 0.9.10b1 for Windows from 
 and Redsn0w 0.9.10b1 for Mac from 
” on your desktop.
You need to download the iOS 5.0.1 firmware file (
 (iPhone 3,1_5.0.1_9A405_Restore.ipsw)
 (iPhone 2,1_5.0.1_9A405_Restore.ipsw)
Double click the Redsn0w zip file and extract the application to the Redsn0w folder.
Connect your iPhone to the computer, which should automatically launch iTunes.
Navigate back to the Redsn0w folder and launch the Redsn0w application.
Click on the “Extras” button.
Here click on the “Custom IPSW” button from the options.
 Navigate to the Redsn0w folder on the desktop and select the downloaded iOS 5.0.1 firmware file (iPhone 4 users – please select iPhone 3,1_5.0.1_9A405_Restore.ipsw and iPhone 3GS users – please select iPhone 2,1_5.0.1_9A405_Restore.ipsw).
Redsn0w should now creating the custom iOS 5 firmware file.
Once the custom iOS 5 firmware file is successfully created, you will be notified with a dialogue box. Click on the Ok button to continue. You will notice that Redsn0w has created the custom iOS 5.0.1 firmware file with a prefix “NO_BB_”. So custom iOS 5 firmware file for iPhone 4 will be 
NO_BB_iPhone 3,1_5.0.1_9A405_Restore.ipsw
NO_BB_iPhone 2,1_5.0.1_9A405_Restore.ipsw
into the DFU mode. Redsn0w will take you through the necessary steps:
Redsn0w will run the Limera1n exploit.
You will be notified when your iPhone is in Pwned DFU mode. The Pwned DFU will allow you to restore your iPhone using the custom iOS 5 firmware file.
Now launch iTunes.
‘ section on the left pane of iTunes, select your iPhone . Now, hold down the Option button (or Shift button for Windows) and click the ‘
‘ button.
It is very important that you hold down the Option button (or Shift button for Windows) else you will end up accidentally upgrading your iPhone to iOS 5, so please follow the instructions carefully.
Navigate to the Redsn0w folder on the desktop and select the downloaded iOS 5 firmware file (iPhone 4 users – please select NO_BB_iPhone 3,1_5.0.1_9A405_Restore.ipsw and iPhone 3GS users – please select NO_BB_iPhone 2,1_5.0.1_9A405_Restore.ipsw). Click on the ‘
‘ button to let iTunes update your iPhone with the jailbroken custom iOS 5 firmware. You will be asked to setup your iPhone either from a previous backup or setup as a new iPhone , select the backup you want for your device (ideally should be the most recent one). Wait for iTunes to finish.
After this, you need to follow the instructions in our 
to jailbreak your iPhone on iOS 5.0.1.
If you’re new to the jailbreaking world and wondering what to do after jailbreaking your iPhone , checkout our
category page to find out the apps you can install on your iPhone using the Cydia app. Please note that some of the jailbreak apps and tweaks are still not compatible with iOS 5/iOS 5.0.1 so please be cautious while installing them.
Hope this helped. Please don’t forget to let us know how it goes in the comments and drop us a line if you hit any issues and don’t forget to give a 
 for all his hard work.

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