iPhone Techie

Hey guys, as promised here is a detailed GreenPois0n RC5 iOS 4.2.1 Untethered Jailbreak Tutorial on how to Jailbreak iOS 4.1 iPhone 4, 3GS, iPod Touch 3G and 4G and of course the iPad with this tool.

First thing you need to do is Update your iPhone and / or iPod Touch to iOS 4.2.1. Remember: Do not update to iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. You can update to iOS 4.2.1 without upgrading your baseband by following this tutorial. (VERIZON iPhone 4 Users Disregard This message… This note is for GSM iPhones ONLY / AT&T)

These are instructions on how to jailbreak your iPhone 3GS, iPhone 4, iPad and iPod Touch 3G (3rd Generation) and 4G (4th Generation) using GreenPois0n RC5 iOS 4.2.1 Untethered Jailbreak for Windows. Greenpois0n supports the iOS 4.1 and iOS 4.2.1 firmware. for iPhone 4, iPad, iPod Touch 3G and 4G iOS 4.2.1 which you can find here. in our Firmware Download Section. (NOTE: Please make sure you download the right file/firmware for the right device)

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Step One
Open your web browser of choice and navigate to http://www.greenpois0n.com. Click the Windows link at the bottom of the screen.

Step Two
When prompted save the download to your desktop

Step Three
Double click the downloaded gp_win_rc5_b2.zip file then drag the greenpois0n.exe file to the desktop. Double greenpois0n.exe from the desktop to launch the application

Step Four
Power off your iPhone then click the large Prepare to Jailbreak (DFU) button

Step Five
You will now be instructed on how to place your iPhone into DFU mode.

You will be asked to press and hold the sleep button for 2 seconds.

Continue holding sleep; press and hold home for 10 seconds.

Release sleep button; continue holding home for 15 seconds.

Step Six
Once your iPhone is successfully in DFU mode you may click the Jailbreak button.

Step Seven
Greenpois0n will now jailbreak your device

Step Eight
Click the Quit button once the software application has completed.

You’ll notice some verbose mode text scrolling on your device.

Step Nine
After the iPhone restarts you’ll notice a new Loader application on your Springboard. Press to launch it.

Step Ten
Press to select Cydia then press the large Install Cydia button that appears.

Step Eleven
Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.

Step Twelve
Restart your iPhone then run Cydia. Let it do all the necessary updates then follow our Unlock tutorial if possible for your device.

You can follow us on Twitter or join our Facebook fanpage to keep yourself updated on all the latest news from Apple, Jailbreaking, Unlocking, iPhone, iPad, iPod Touch and other devices