Jailbreak iOS 4.2.1 iPhone 4, 3GS, 3G using Redsn0w | iPhone

email In petroleum direct you determination study how to jailbreak iOS 4.2.1 iPhone 4, 3GS, 3G by,by means of RedSn0w on Windows. Just go after the step-by-step instruction to jailbreak iOS 4.2.1. See additional jailbreak guides.

Important:

• Tether jailbreak: iPhone 4, iPhone 3GS (new bootrom), iPod touch 2G (MC Model), iPod touch 3G, iPod touch 4G. Tethered jailbreak for newer models, income if you reboot the device after that to boot rear eager on jailbreak condition you require to connect by means of device by means of computer and boot it by,by means of RedSn0w.
• Untether Jailbreak: iPhone 3G, iPhone 3GS (old bootrom), iPod touch 2G (Non-MC)
  
• Unlock for iOS 4.2.1 is not obtainable yet so stay absent as of jailbreak if you require to unlock by means of device as well.

Step-1

Download and restore iOS 4.2.1

• Download iOS 4.2.1 for by means of device.
• Download Redsn0w.

Step-2

Run iTunes and select by means of device as of absent pane.

Step-3

Hold downward the Shift key as of keyboard and hit the Restore button.

Select the iOS 4.2.1 firmware ipsw folder so as to you contain downloaded and hit the Open button. Let the iTunes come to an end the update process.

Jailbreak iOS 4.2.1

Step-4

Extract the downloaded redsn0w_win_0.9.6b4.zip folder and run redsn0w.exe file.

Step-5

Hit the “Browse” button and select the iOS 4.2.1 firmware ipsw.

Step-6

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When IPSW productively identified, hit the “Next” button and let the redsn0w prepare jailbreak data.

Step-7

Check the “Install Cydia” alternative and hit “Next”.

Step-8

Make certain by means of device is plugged eager on computer and Turned Off as well, hit the “Next” button.

Step-9

Now put by means of device eager on DFU mode, redsn0w determination direct you to do that. Read the on monitor ladder to put by means of device eager on DFU mode.

Redsn0w determination create jailbreak process, stay for the Done! communication and after that hit the Finish button.

When by means of iPhone finishes rebooting, now by means of iPhone is Jailbroken and you can discover Cydia icon on springboard.

To reboot tethered jailbreak device, Check “Just boot tethered rignt now” alternative and hit Next button.

Thanks to Dev-Team

See also:

• Jailbreak iOS 4.2.1 Untethered by means of GreenPois0n RC5
• Jailbreak iPad 4.2.1 Untethered
• Jailbreak iOS 4.2.6 Verizon iPhone 4

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