Redsn0w 0.9.7b1 Untethered Jailbreak On iOS 4.2.1 For iPad, iPhone 4 & iPod Touch


by casey on December 26, 2010

As we know that Redns0w 0.9.7b1 has been released as promised by the iPhone Dev Team. The version is released for untethered jailbreak on iOS 4.2.1 for iPad, iPhone 4 and iPod Touch. At the moment, iPhone 3GS and 3G versions are not supported but soon it will show compatibility with these devices as well.

We have promised to come up with a HOW TO GUIDE for untethered iOS 4.2.1 jailbreak. So here we are :)

STEP BY STEP HOW TO GUIDE FOR UNTETHERED JAILBREAK ON IOS 4.2.1 iPad, iPhone 4 and iPod Touch Using Redns0w 0.9.7b1.

Note: Skip to step 2 directly if your device is already tethered jailbroken on iOS 4.2.1.



  • Now go to Cydia and see whether SHSH blobs of iOS 4.2b3 are saved or not.
  • It will be showing you a status “SHSH: 4.1, 4.2b3″

untethered jailbreak iOS 4.2.1 - 1


Step 4:

  • Download & unzip usbmuxd on your desktop from here.
  • Launch Mac Terminal.
  • Type these command lines:

cd / Users/votrenom/Desktop/usbmuxd-1.0.6/python-client


chmod + x


. / Does 22:2222

untethered 4.2.1


  • Now run Redsn0w 0.9.7b1
  • Click ‘Browse’ button to point it to original firmware 4.2.1 (iPhone3, 1_4.2.1_8C148_Restore)

iPad iOS 4.2.1 untethered

untethered jailbreak iOS 4.2.1 iPhone


  • Check the Jailbreak Monte option for untethered iOS 4.2.1 jailbreak
  • Point it to iOS 4.2 beta 3 firmware (iPhone3, 1_4.2_8C5115c_Restore)

jailbreak monte untethered


  • Now put your iDevice on DFU mode by a self explanatory instructions. You can see below images to take help.

DFU Mode Mac

Congratulations! You have successfully completed the process of untethered jailbreak on iOS 4.2.1 :)

At the moment, Redsn0w 0.9.7 is released as a first beta. The upcoming version will be supporting Windows OS users and built in usbmuxd support.

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We Write Very Rite

  • Yaa yaa

    please can i jailbreak and unlock my iphone 4 iso 4.2.1 and use with different carrier outside usa since it’s locked to at & t?
    thanks very much.

  • Nathantrinh

    As of now you cannot unlock iphone 4 ios 4.2.1 but the unlock is anticipated to be released within the next week.

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