iOS Mods

April 4, 2011

How To Jailbreak IOS 4.3.1 Untethered IPHONE 4 Step-By-Step Guide

Happy days folks those wonderfull hackers at dev-team blog have done it again almost Three years to the day of there first ever release.

The 4.3.1 untethered Jailbreak comes courtesy of the famous hacker Steffan Esser (@i0n1c) who is a security researcher based in germany. Ironicly his first contribution to the jailbreak community was to beat Apple to the punch with improved security and implemented ASLR for Jailbroken iphones with his “antidOte” framework.

This Untethered Jailbreak works on the following devices

– Iphone 3gs

– Iphone 4 (gsm)

– Ipod Touch 3g

– Ipod Touch 4g

– Ipad 1

– Apple TV 2g (pwnage tool only at the moment)

As you see the only downside is that the untether is not compatible with the Ipad2 due to the fact this device requires a bootroom or iBoot-level exploit. Dont fear it is on its way as i posted Yesterday.

This tutorial covers iphone 4 gsm users more tutorials to follow

WARNING WARNING – ultrasnOw users do not use this yet. The dev team have to fix some incompatibilities  when FW 4.3.1  is used on older basebands supported by ultrasnOw. Obviously you should only ever get there using a custom ipsw from pwnage, snOwbreeze or xpwn. Please subscribe as i will have the update as soon as it drops.

Users are advised to use RedsnOw as its the easiest tool to use and compatible on both windows and mac.



OS X RedsnOw

Windows RedsOw

For pwnage tool official torrent link please visit Dev-Team-Blog and dont forget to consider a donation to them for there great work.

Windows 7 users – If you experience problems try the redsn0w executable mode as an administrator in Windows Vista compatibility mode if you experience any trouble.

Tutorial for Windows  and mac users Iphone 4

1. Create a folder on your desktop call it PWNED

2. Now drag the you downloaded from above into your PWNED folder and extract it there.

3. Now download Iphone 4 ipsw and place it in the PWNED folder

4. Now connect your phone to your computer and launch itunes.

5. Next step is to hold down SHIFT on your keyboard and press restore at the same time. This will open up a window  then just navigate to your PWNED folder and select the iPHONE 4 4.3.1 IPSW.

6. When Itunes is finished updating your iphone go back to your desktop and launch the redsnOw application that we extracted earlier.


7. When redsnOw launches all you have to do now is select the Browse button and when the window pops up navigate to your PWNED folder and again select that 4.3.1 ipsw and click open.

8. When it says IPSW successfully identified just click NEXT.


9. Redsnow will now prepare your Jailbreak data


10. When the next window appears you can select what options you would like just make sure you select Cydia


11. Ok the next window will pop up asking you to make sure your phone is plugged into the computer and turned off so turn it off and click the next button, prepare yourself for some on screen instructions.


12. Ok Just follow the onscreen commands now  to get into DFU mode.




13. Your phone will now Reeboot dont panic


14. Ok so now redsnow will upload your new Ramdisk and Kernal


15. Ok When redsnOw is done click the finish button, the rest of the jailbreak now takes place on your iphone so do not touch it untill it finishes Reebooting this can take at least 5minutes so do not panic. When its finished you will now have cydia on your phone HAPPY DAYS.


I would like to give a HUGE THANKS to Iphone-Dev-Team and i0n1c for there hard work and for giving there time up to bring us these great tools. Please consider a small donation to them here

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Ryan Oneill

Editor In Chief

BeginnersTech was an idea I had one Sunday when I was bored. It is now not only a website but a successful YouTube channel that takes me all over the world. Don’t ever let anyone discourage you. Chase those dreams.