Here’s How to Jailbreak 5.1 iOS iPhone 4/3GS, iPod Touch 3G/4G, iPad with Redsn0w 0.9.10b6

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You can now jailbreak iOS 5.1 firmware. The iPhone Dev team has packaged the Geohot’s limera1n exploit into Redsn0w 0.9.10b6 (both Mac and Windows) which allow you to jailbreak iOS 5.1 running on iPhone 4/3GS, iPod touch 4G/3G and iPad 1G. Users with iPad 2 and iPhone 4S need to wait for few days until we hear something from hacker’s camp.

Since the nature of iOS 5.1 Jailbreak is tethered, you are required to plug your jailbroken iPhone, iPad or iPod touch into computer and re-run the process to get your iOS device up and running again, every time when the battery drains out or you inadvertently shut-down your phone or you are forced to reboot it after having issues. Failing to do so will leave your device at the “connect to iTunes” screen. But BigBoss’ Semi tethered jailbreak eases the pain.

5.1 Jailbreak

BigBoss’ “semi tethered jailbreak” allows you to reboot your iPhone and use stock apps but with some limitations. The semi-tethered jailbreak solution comes handy when you shut down the iPhone while travelling. With this little hack you are no longer stranded and you can reboot your device and use your phone, text, and many other features, which otherwise is not possible. Jailbreak tweaks and settings cannot be used until you boot tether your iPhone, iPad or iPod touch, however.

Supported Devices

Redsn0w 0.9.10b6 supports iPhone 3GS (Old Bootrom, new bootrom), iPhone 4 (GSM, CDMA), 1st-gen iPad, iPod touch 3G, iPod touch 4G. It does not support Apple TV2, iPhone 4S and iPad 2 right now. The reason the untether won’t work as-is on the iPad 2 or iPhone 4S is that it requires a bootrom or iBoot-level exploit to install, and the iPad2 or iPhone 4S is not susceptible to the limera1n bootrom exploits.

Note for iPhone Unlockers

ultrasn0w unlockers must create custom IPSW iOS 5.1 which will protect their baseband firmware from being upgraded. iPhone 4 and iPhone 3GS owners can use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. If you try restoring your iPhone to a stock Apple IPSW, your iPhone will be locked. iPhone Dev Team is hard at work to update ultrasn0w unlock for 5.1 compatibility and will be released in the next few days. However, it will support only older basebands – 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00.

Steps to create custom 5.1 iOS firmware to preserve Baseband

  1. Launch Redsn0w, select “Extras”, and then select “Custom IPSW”.
  2. Locate your iOS 5.1 Stock firmware then the Redsn0w will run a number of background processes to create custom IPSW which is pre-jailbroken with preserved baseband.
  3. Navigate to Extras > Pwned DFU and restore to your custom iOS 5.1 firmware (created in step 2) using iTunes. You’ll then be able to unlock your iPhone with GEVEY or Ultrasn0w.

Note: We haven’t tested Gevey SIM or any other SIM interposer yet.

Here’s the full guide on how to Semi-Untether jailbreak your iOS 5.1 Device using Redsn0w 0.9.10b6 on Mac OS. Steps are same for Windows users.

Pre-requisites

  • An iPhone 4, 3GS or iPod Touch 4G, 3G or iPad 1G
  • Latest iTunes installed on your computer.
  • Download iOS 5.1 on your desktop.
  • Download Redsn0w 0.9.10b6 [Mac OS, Windows]

Step 1: Run Redsn0w 0.9.10b6 and click the Jailbreak button.

redsn0w 0.9.10b6 Jailbreak

Step 2: Connect the iPod Touch or iPhone or iPad to Windows or Mac via USB cable. Make sure it’s OFF then click the Next button.

Step 3: You will be prompted to put the iOS device in DFU mode. Follow the on-screen instructions. To enter in DFU mode: Press the Home and Power together for exactly 10 seconds. Release the Power button and continue holding the Home button until RedSn0w detects the device.

Step 4: Now you “MUST” boot tether your iOS device. To do so, launch iPhone Dev Team’s RedSn0w tool and select Extras then Just boot from the menu (as shown in screenshot below) to boot your device tethered.

redsn0w

Steps for Semi-Tethered Jailbreak

Step 1: Launch Cydia from your Springboard.

Step 2: Enter http://thebigboss.org/semitether into the field and tap the Add Source button. Then, press the large Return to Cydia button.

SemiTethered iOS5.1 Jailbreak

Step 3: Select thebigboss.org from the list of Sources

Step 4: Select SemiTether from the listed Packages and then press the “install” button at the top right of the screen.

Step 5: When prompted, press the Confirm button to start the installation process.

Step 6: Finally, Press the large Reboot Device button to reboot your iOS device without hanging at the Apple logo.

You have now jailbroken your iPhone 4/3GS – iPad 1G – iPod touch 4G/3G on iOS 5.1 (semi-tethered) successfully. If you have any query or issue, feel free to contact @JAlLBREAKS.

Related posts:

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  2. Sara Cydia App: Best Alternative to Siri on iPhone 4/3GS, iPad 2 or iPod Touch
  3. GRWH siriServer: How to Install Siri on iPhone 4, 3GS, iPad, iPod touch Legally
  4. How to Update Cydia Apps & Tweaks on iPad, iPhone, iPod touch
  5. AppSlide Tweak: Brings Physical Back Button to iPhone and iPod touch
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  • http://www.facebook.com/DZamoraF Daniel ZF

    I’ve got a locked Ipad (conect to itunes) but dont have the same pc it was synced, will this help to birng it back?

  • landopit

    i got an iphone 4 cdma 5.1 tethered i installed semitethered my phone turned off now when i try to boot the phone gets to a point where it says limera exploits failed

  • Kolbinf45

    hey chief is it possible for iphone4 firmware 4.10.01,version 4.3.1 could be unlock through redsnow???ans me asap

  • sledbiz

    Iphone4 CDMA, pretty fluent in jailbreaking.  Anyone run into this?  I attempt to jailbreak with Redsn0w, package says it’s loading, waits for reboot and Iphone reboots normal.  Like I never did a thing.  I have jailbroken dozens of phones and never seen this.  IOS 5.1.  Any ideas?  Thx

  • http://www.facebook.com/profile.php?id=528214704 Drew Davis

    right now my modem firmware reads 04.12.01, is there anyway to get a modem baseband that is preservable for unlock?

    • http://cydiablog.com Mike Webb

      No you cannot unlock 04.12.01 using Ultrasn0w

  • http://www.facebook.com/profile.php?id=528214704 Drew Davis

    when it says ‘preserve baseband’ does that mean that only those who already have the listed basebands can ever hope to unlock… if they preserve that said baseband…? so in other words if i dont have one of those older basebands i have no chance of carrier unlock?

  • http://www.facebook.com/rhodefinder Jason RhodeFinder

    dd

    • http://cydiablog.com Mike Webb

      Jason,

      You’re out of luck for time being…You have to wait for iPhone 4S 5.1 jailbreak support

  • Scary Monkey

    I updated my iPod Touch 4G to iOS 5.1 and jailbroke it with redsn0w, no
    issues there it was fast and straight forward, HOWEVER, I’ve found an
    issue in which all the apps I open are only a quarter of their size
    located in the top left corner and I do not seem able to fix it… any
    help would be appreciate it!!!

    • http://cydiablog.com Mike Webb

      Open in safe mode, and uninstall latest installed tweaks from Cydia, and respring. İf not so, reboot your iPod touch 4G.

    • http://cydiablog.com Mike Webb

      Check out the video on how to Fix 
      1/4 Screen for Jailbroken iPod Touch 4G

      http://www.youtube.com/watch?feature=player_embedded&v=WeWT4WuJWVg

  • Toby

    I have iphone 3gs with OS 5.1 from itunes and baseband 6.15.00  
    I can jailbreak tethered but i get NO SERVICE .
    I have tryed ultrasn0w 1.2.5 from cydia it goes to reboot – then wont reboot with redsnow –   i have to do the process all over again it will just reboot itself for no reason – what am i missing here am i ment to get a custom OS 5.1 is that the problem?

    • http://cydiablog.com Mike Webb

      Toby,

      As of now official Ultrasn0w 1.2.5 doesn’t support unlocking. However, an Ultrasn0w fixer patch can be used to unlock the iPhone. Read here for details http://cydiablog.com/unlock-ios-5.1-iphone-4-3gs-ultrasn0w-fixer-for-5.1/

    • Richard

      Note that if you updated directly to 5.1 via iTunes and stock IPSW, you will have to re-flash your baseband to 6.15 as the “stock” update to 5.1 will corrupt the baseband, making it unlockable until you reflash.

  • Compute54

    I have iphone 4s witrhthenew 5.1 9B179 Cantseem to find jailbreak for it

    • http://cydiablog.com Mike Webb

      iPhone 4S on iOS 5.1 cannot be jailbroken by Absinthe, Redsn0w, Sn0wbreeze right now.

    • Joseph51423

      You only have to have redsnow 0.9.10, and find a IPSW for it. Download the IPSW, and then with redsnow, go to extras, select IPSW, then select IPSW that you downloaded.  After than go to back to jailbreak and follow the steps.  But it is a tetherd jailbreak, for all I know they have not found a un-tether like Corona 5.0.1 untether.  But I am sure it will come soon

  • Niguelgunther

    i have iphone 3gs with os 5.1 and baseband 6.15.00 
    i can jailbreak tethered but i get only NO SERVICE .
    i have used the ultrasn0w 1.2.5 from cydia .
    pl help

    • Zanst_osman

      i hade same problem i downgrade to 4.3.3,m just wait ultrasn0w will be updated for 5.1 in the next few days. 

    • Henkverlaan

      Renew your baseband

  • Bryan

    Having iOS 5.1 on ipod touch 4G. did a jailbreak using the latest redsnow, but it stucks on “Waiting for Reboot” and my ipod touch reboots to the normal iOS.
    Any advice?
    PS. I know how to DFU mode 

    • Scary Monkey

      Easy, you need to select the IPSW mannually from the Extras section

    • Joseph51423

      You have to select a IPSW download.  Very easy to find, but remember that it’s going to be a tetherd jailbreak, they have not found a un-tether for all I know for iOS 5.1

  • Christodouluke

    Is it possible to still go back to 5.0.1 with shsh saved?

    • http://cydiablog.com Mike Webb

      Yes! 
      If you have a device earlier than the iPad2 or iPhone 4S, you can downgrade to whatever version you want, as long as you have saved SHSH blobs for that version.

    • Joseph51423

      Yes, I would