Tutorial: IOS untethered jailbreak 4.2.1 with Redsn0w 0.9.7b5

IPhone is only for 4, iPad Touch iPod 4G

Remember that the iPhone 3G and 3G to jailbreak bootrom untethered old and have a lifetime, so just lay off the new bootrom 3GS

It is only for Mac, there is a problem with the version of Windows, which works only with hard drive and not to RAM and takes a lot to patch the kernel, so do not leave until it is fixed.

NOTE: It is recommended to clean restaurant (set up as new iPhone) before the process

Need:

Have your device tethered iOS 4.2.1 and jailbreak

You can follow this tutorial to jailbreak tethered if you have not .

Redsn0w 0.9.7b5 (download it here )

The 4.2.1 firmware for your device (click here )

The IOS SHSH 4.2b3

4.2b3 firmware of your device (we can not daroslo here because it is illegal because only the developers should have access to it, do it under your responsibility)

Tutorial:

Open Redsn0w 0.9.7b5
Select the firmware 4.2.1

Click Next

Select Jailbreak Monte (untether)

We ask for the ipsw 4.2b3 iOS, select it:

Connect your iPhone, turn it off and follow the steps to put it in DFU

And that's it, now you jailbreak is untethered

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