How To Jailbreak 4.2.1 Untethered On iPhone 4, iPod Touch 4, iPad Using Redsn0w 0.9.7b1

The iPhone Dev Team have released Redsn0w 0.9.7b1 for Mac OS X for untethered jailbreak of iPhone 4, iPod Touch 4, and iPad. This ‘backup plan’ to have an untethered jailbreak is currently available only for Mac users, and requires iOS 4.2 Beta 3 IPSW as well as 4.2b3 SHSH blobs saved on Cydia for your iDevice.

Before you proceed with the jailbreak, there are some important things you need to know.

1. Redsn0w 0.9.7 Beta 1 works only for iPhone 4, iPod Touch 4G, and iPad.

2. Ultrasn0w unlockers are recommended to stay away, and wait for the final version.

3. Make sure Cydia has your 4.2b3 SHSH saved. You should see 4.2b3 on Cydia’s home screen on your iDevice.


4. Bluetooth is currently disabled.

Warning: This is a beta testing version of Redsn0w, so stay away if you care for unlock or have lots of data on your device without a backup.

Jailbreak iPhone 4, iPod Touch 4G, iPad iOS 4.2.1 Untethered Using Redsn0w 0.9.7 Beta 1

Here are the steps to untether your 4.2.1 jailbreak on iPhone 4, iPod Touch 4, and iPad.

Follow our guides to jailbreak your iPhone 4, iPod Touch 4, or iPad using Redsn0w:

Jailbreak iOS 4.2.1 iPhone 4

Jailbreak iOS 4.2.1 iPod Touch 4G

Jailbreak iPad 4.2.1

You can also do a clean restore to iOS 4.2.1 IPSW (not Beta 3) and then jailbreak it with Redsn0w 0.9.7. In Step 5 below, select the option ‘Install Cydia’ along with the option ‘Jailbreak Monte’.

Those who already are jailbroken on iOS 4.2.1 using a previous version of Redsn0w can leave the option ‘Install Cydia’ unselected.

Step 1: For Redsn0w 0.9.7 Beta 1 to work, you require usbmuxd software installed and running on your Mac. This requirement will be gone in the final version.

Download usbmuxd package and extract it’s contents.

Open Terminal on your Mac and cd to the ‘python-client’ directory of the extracted usbmuxd folder.

Type the following commands one after the other as shown in the screenshot below.

chmod +x

./ –t 22:2222

You should see the message ‘Forwarding local port 2222 to remote port 22’.jailbreak_4.2.1_iPhone_4_untethered

Step 2: Run Redsn0w 0.9.7b1 and select iOS 4.2.1 IPSW for iPhone 4, iPod Touch 4, or iPad. All download links at bottom.


Step 3: Let Redsn0w identify the IPSW. Click Next.

Sit patiently as this step may take quite a while.


Step 4: Redsn0w will now prepare jailbreak data by patching the kernel.

Step 5: In the next screen, select the option ‘Jailbreak Monte’ for untethered jailbreak. As soon as you check this option, you will be asked to browse and select iOS 4.2 Beta 3 IPSW for iPhone 4.


iOS 4.2 Beta 3 is currently available only for Apple registered developers, but a little bit of googling may help you find it on any of the content sharing sites.

Step 6. Click Next.

Step 7. You are asked to plug in your iPhone 4 and switch it off.


Step 8. Put your iPhone in DFU mode.

A. Hold down the POWER/SLEEP button for 3 seconds.

B. Without releasing the POWER button, also hold the HOME button for 10 seconds.

C. Without releasing the HOME button, release the POWER button. But KEEP holding the HOME button for another 15 seconds.jailbreak_redsn0w_0.9.7_download

Step 9: Now sit patiently as Redsn0w jailbreaks your iPhone. It may take a while on the ‘Preparing Jailbreak Monte files’ screen.


When your iPhone 4 or iPad restarts you have a complete untethered 4.2.1 jailbreak, so no more plugging into your Computer to ‘boot into tethered option’ or tethered symptoms such as white Cydia icon or Safari crashes!

Download iOS 4.2.1 for iPhone 4, iPod Touch 4, iPad

Download Redsn0w 0.9.7 Beta 1 for Mac OS X

Update 1

Download Redsn0w 0.9.7 Beta 2 for Mac OS X. This version fixes native app crashes, including that of TaskSwitcher in Springboard.

(Windows version of Redsn0w 0.9.7b1 is not yet released)

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34 Responses

  1. felix says:

    My iPhone 4, is running 4.2.1 and it’s wasn’t jailbroken prior to. So will I have to have 4.2b3 SHSH saved? Thanks

    • dkszone says:

      You need 4.2b3 SHSH saved on Cydia if you want the untethered jailbreak using redsn0w 0.9.7 beta.
      To save SHSH blobs, simply run TinyUmbrella and click the ‘Save SHSH’ button. It will do the rest.
      You don’t have to be on 4.2 Beta 3 firmware, TU will automatically save SHSH blobs for all the firmware.

  2. Felix says:

    So I assume I have to jailbreak my phone using the tethered version first, save the SHSH, then use the beta untethered version jailbreak?

    • dkszone says:

      TinyUmbrella can save your SHSH even if you have not jailbroken your iPhone. Also there is no need to be on 4.2 Beta 3 firmware to save SHSH for that FW.
      We would suggest you to save SHSH using TU, do a clean restore to iOS 4.2.1 and then jailbreak using redsn0w 0.9.7b3 (steps are same as given in article above).

  3. Carlos says:

    On My Cydia I have :
    SHSH: iOS 4.2.1 – that’s it- (I chose make my life easier and waited a couple of days for the pending TSS request). No blobs for 4.2 beta 3.
    When I got my ipad from the apple store it was running 4.2.1 version.

    How can I proceed with the untethered version if I don’t have 4.2 beta 3 blobs.

  4. francis says:

    i have a stock 4.2 ipad that i upgraded to 4.2.1 then tethered jailbroken with redsnow.
    i used tinyumbrella to save shsh blob, and cydia reports that i have shsh blob 4.2.1 saved.
    based on your tutorial i should have shsh 4.2b3 on cydia… can i possibly do that?
    please help me.

  5. Van says:

    I have waited to up grade iPhone 4.0 so that I could get 4.2.1 untethered ! Now I hook up and tu and get no 4.2b3 shsh. Now what am I to do ? I have new iPad with 4.2.1 and same problem tu does not give shsh. Tu is useless and so is the current untethered 4.2.1 when is a real jailbreak coming ?

  6. Francis says:

    Living with tethered jailbreak for now.

  7. Carlos says:

    Thanks dkszone. I will live with the tethered JB until a new tool that doesn’t require 4.2 beta 3 blobs comes up. The single click procedure is not worth it in my opinion. If you still have to connect you ipad to the computer and put it in DFU mode there is no point. Thank you for the info anyways !

  8. dkszone says:

    To make life easy for untethered jailbreak users, Redsn0w 0.9.6rc7 is released. Here is how you can do single click jailbreak or tethered boot on iOS 4.2.1 using Redsn0w 0.9.6 rc7.

  9. ycengiz says:

    i have iphone4 with simlock now. before it was 4.0 and jailbroken with cydia and simlock has broken bur ı made a mistake and updated to 4.2.1. can ı make it download or can make it jailbreak to open simlock? it’s so bad ı can not use my iphone now. ı have not sim card to open iphone already. what can i do? how can use my iphone?

  10. Jason says:

    dkszone, do you know if there is a jailbreak out for the iPhone 3GS 4.2.1 new Bootrom?


  11. wilson says:

    Pls help me im stuck. im about to jailbreak my iphone 4 to 4.2.1 sing redsnow beta 4 and error occur ” its possible your SHSH blobs aren’t on the cydia server. pls hellpp!!!!

  12. Clod says:

    is it just normal that jailbroken iPad 4.2.1 would not start or boot if you don’t use redsn0w. I turned my iPad off and it won’t start anymore, i have to use redsn0w just to boot it again.

  13. Carlos says:

    @clod. This is normal. What you have is a Tethered Jailbreak. This means you have to use the “Just boot tethered now” option in redsnow to boot your device EVERYTIME you turn off your ipad. If you want an UNtethered Jailbreak you must have the SHSH blobs 4.2b3 showing in Cydia. And then proceed with the UNtethered JAilbreak

  14. Clod says:

    @ Carlos. Thanks. Now I have the same question as you have.. how do i get SHSH blobs 4.2b3 showing in Cydia… anyway, we still need to wait for the untethered jailbreak on windows xp..

  15. Max says:

    My iPad is not working any more after trying to untether. It stuck during a reboot…

  16. Carlos says:

    @ Clod , @wilson.
    Dkszone correct me if I’m wrong please. This is my experience with SHSH blobs 4.2b3.

    Apple only signs SHSH blobs for the current firmware that is 4.2.1 . If Apple signed your blobs for version 4.2b3 then they are on your ipad/iphone (Not necessarily showing on Cydia). If Apple never signed your blobs for 4.2b3 then there is no way back, you cannot have them, and you never will (Current Untethered Jailbreak that relies on 4.2b3 blobs is not for you- my case-).

    How to know if your device has blobs for 4.2b3? Well you can either use tiny umbrella (-google is Free-) to see what blobs you have on your device and Save them to your computer for backup. You don’t need a tethered Jailbreak to use tiny umbrella.
    The other way is to check the top line of Cydia ( if you chose make my life easier and waited for the pendind TSS request) for your blobs saved on the Cydia server. I recommend tiny umbrella since it tells you what blobs you have and what blobs you don’t. Good Luck

  17. nagib says:

    i still dont understand how 2 unlock my i phone 4 4.2.1

  18. Devilish says:

    I can’t get it!!
    is there untethered Jail beak for iPhone 4 4.2.1 for WINDOWS, WINDOWS??


  19. Fred says:

    I have googled and searched and am not a novice at Jailbreaking. But the one question I just can’t find an answer to, and everyone just jumps to without much explanation is that: I just bought my iphone 4 this after Christmas. I do not have the option of the 4.2b3, right? I mean, I can jb by tethered, and have my shsh for 4.2.1 on Cydia and TU, but there is no way to get the 4.2b3, correct? Please help, someone. Just want to know if I’m wasting my time. Again, the iphone 4 is new and canme out of the box with 4.2.1 and firmware 3.10. btw, I am jb but tethered now. I will be going overseas to vietnam in 4 weeks, and need to get untethered jb, and hopefully unlocked before then. If I can’t, then in vietnam I can have someone open the phone up and reverse the fw manually to 4.1, but I am reluctant to do that. But, if anything, I need the jb untethered bc travel overseas doesn’t warrant always haveing access to my laptop. Thanks. Simple question for clarity: Can I get shsh 4.2b3 or not having a new iphone 4 this month?

    • dkszone says:

      Use TinyUmbrella to save SHSH for your iPhone 4. You don’t have to be on 4.2b3 for TU to save SHSH for 4.2b3.
      Saving of SHSH depends on Apple’s servers signing for that firmware, and not the firmware on your device.

      • Fred says:

        Thanks dkszone. But again, I think you missed what I am asking. My iphone 4 is new and I bought it after Christmas. I have the SHSH 4.2.1 on Cydia and in TU right now. That’s not my problem. Question is, from what I understand now, I cannot get the 4.2b3 now, correct? I just want to know, if I can or cannot get 4.2.b3 shsh. If I can, how do I do it? I have the 4.2b3 firmware downloaded from earlier this month. So, can I or can’t I get the 4.2b3 shsh blob? I know it is specific to my iphone 4; so, it cannot be used from someone else.

  20. Fred says:

    Also, I did download the 4.2b3 firmware iPhone3,1_4.2_8C5115c_Restore.ipsw

  21. paulo says:

    How long it gone take to turn device on, since the message finish, appears on the screen?

  22. Hafi says:

    i have ipod 2 & 3G and there aren’t Jailbreak , may i know the step by step to use windows platform for JB those Ipod?

  23. raj says:

    i already jail broken my iphone4 thethered now may i know the process of unthethered jail brake

  24. Aussie says:

    hi all, I have a new iPod touch 4.2.1 and no advanced pc skills. lol in lamens terms can you please tell me how this all works and why I should do it? very much appreciated 🙂