iPhone Dev-Team Releases Untethered Jailbreak for iOS 4.3.1

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Posted April 4, 2011 at 4:48am by iClarified · 196528 views

The iPhone Dev-Team has released an untethered jailbreak for iOS 4.3.1. The jailbreak implements the untether developed by i0n1c.

The 4.3.1 untether exploit comes courtesy of Stefan Esser (@i0n1c on twitter), a security researcher based in Germany. Stefan has a long history of vulnerability research, and ironically his first contribution to the iPhone jailbreak community was improved security — last year he beat Apple to the punch and implemented ASLR for jailbroken iPhones with his "antid0te" framework. We're happy to see that Stefan then turned his iPhone attention over to an untethered jailbreak exploit!

Supported devices are the iPhone 4, iPhone 3GS, iPod touch 4G, iPod touch 3G, iPad 1 and Apple TV 2. The iPad 2 is not supported as of yet.

You can download either RedSn0w or PwnageTool to perform the jailbreak. Download links can be found here:
● RedSn0w (Windows, Mac)
● PwnageTool (Mac)

We will be posting more tutorials on how to perform the jailbreak momentarily.

RedSn0w Tutorials:
● iPhone 4 (Windows, Mac)
● iPhone 3GS (Windows, Mac)
● iPod Touch 4G (Windows, Mac)
● iPod Touch 3G (Windows, Mac)
● iPad 1 (Windows, Mac)

PwnageTool Tutorials:
● iPhone 4 (Mac)
● iPhone 3GS (Mac)

IMPORTANT: Ultrasn0w users don't update yet! The iPhone Dev-Team still needs to release an update to ultrasn0w for the 4.3.1 firmware.

We need to first release an update to ultrasn0w that fixes some incompatibilities when FW 4.3.1 is used on the older basebands supported by ultrasn0w. And remember once we do fix ultrasn0w for 4.3.1 (we'll announce it here and on twitter), you must only get there via a custom IPSW from PwnageTool, Sn0wbreeze or xpwn! Don't ever try to restore or update to a stock IPSW, or you'll lose the unlock!

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iPhone Dev-Team Releases Untethered Jailbreak for iOS 4.3.1

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cokifive - April 7, 2011 at 4:51am

hi guys, i have iphone 3 with os 4.2.1 bb 06.15.00... i used redsn0w before and update to 06.15.00 to unlock my phone. If i upgrade to os 4.3.1 and JB with new redsn0w. does it mean i will lose my carrier unlock?? do i have to do everything all over again (mean JB & unlock)> Thanks in advance

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moe - April 6, 2011 at 10:50pm

how long is the restore suppose to take is been restoring for the past 30 mins, can someone help please

Ahmed Irushad - April 6, 2011 at 5:22pm

dev team, can you please release an unlock for iphone 4 ( baseband 02.10.04 & up ) i am waiting for that almost a year, and many more are still waiting for that, i know you guys can do it, i appreciate your work & i am grateful for that...

Vang - April 6, 2011 at 4:29pm

Funny how people cuss out the Dev crew. But without these peeps your phone is still the same way it is. Quit bitching and find your own solution. Couldn't even ssh into your iPhone. Also keep in mind the Dev guys didn't create thisjailbreak. They just did a test and released it. Should've never been that dumb and updated it.

Steve J - April 6, 2011 at 3:49pm

hei dev team - who needs the jailbreak if 2/3 of iphone 4's are locked in some pointless network.

Chrystal - April 6, 2011 at 1:50pm

Hi There, I'm using redsnow to jailbreak my ipod touch 3g, I followed all the steps, but it always stop at the "uploading ramdisk" step, then the downloading jailbreak data disappears the ipod reboots and still isn't jailbroken while on my pc it is still uploading the ramdisk. Am I doing something wrong?

Wazza - April 6, 2011 at 1:47pm

Hi there, If I toggle the vibrate switch to silent mode, the iPhone is supposed to vibrate as we all know. However, since Jailbreaking, it doesn't always vibrate, and sometimes vibrates when I switch it back to the normal position, when it shouldn't. I restored the phone to pre-jailbreak and it works fine so its definitely a software related issue. Has anyone else noticed this? What could be causing it? Everything else works fine. Thanks in advance.

Tomster88 - April 6, 2011 at 5:09pm

I noticed that too. I have the same issue. I also notice this jailbreak, or maybe it's 4.3.1, is making my phone sluggish.. have you noticed anything like that too?

DAJ721 - May 12, 2011 at 8:54pm

I have the same issue... What can I do?

Martin - April 6, 2011 at 12:09pm

Does this work on the iPhone 3G? (Says only 3Gs in the title)

Noise - April 6, 2011 at 12:36pm

It doesn't. 4.3 and 4.3.1 do don't support iPhone 3, only iPhone 3GS and iPhone 4.

Monty09 - April 6, 2011 at 7:41am

jailbreak went perfect on ipod touch 4th gen however once in cydia and i was adding everything i always add i randomly got a white flash then it went to apple logo with loading bar but my screen with cydia was underneath...? and it let me keep using cydia so i exited and resprung the winterboard and it went a way.... just thought it was really weird. but thansk to the devs!

Mi Bear - April 6, 2011 at 6:40am

I did the redsn0w/jailbreak on a iPhone 4.the jailbreak went flawlessly.I got Cydia And Internet.bb is -04.10.01 The problem is > it's not connecting to AT&T says searching or only one bar .doesn't say AT&T near the signal. Took the sim out and put it in a 3G s and worked fine.did the jb on both win 7 and xp two different laptops.tried running it as admin.slid the airplane mode off and on.IDid numerous other things. Pulling my last hair out (ouch!)any help would be appreciated.thanks!

Ynot - April 6, 2011 at 3:46am

I also would like to thank the dev team for saving us from the restricted world of Apple :) Can you please write some info on the ipad2 jailbreak? if there is a timeline or hope for it thanks

Z!GGY - April 6, 2011 at 1:58am

again the prob with the incoming international calls no name shown with missing the 0 from the start anyway good job dev

Macki - April 5, 2011 at 5:48pm

Thank You dev team for this! and of course i0n1c :) Without the jailbreaks I would never buy the Apple products, It's like the missing part:) Im still wondering why we are not getting any information on the IPad 2 jailbreak? Is Comex going to release the IPad 2 4.3 jailbreak, it couldn't be too hard for him just to twitter saying if he will, and if it's coming soon or something like that :/

Maxi - April 5, 2011 at 8:05am

Work for 3.10.01? thank's.

coolio - April 5, 2011 at 5:42am

I had some troubles with Redsn0w jailbreaking.. so had to use the pwnage tool to make custom IPSW. But now my 3GS is up and running perfectly.. thanks dev-Team and everyone behind it.

Jay - April 5, 2011 at 12:53am

So does this mean the unlock is right around the corner for 4.3?

Rez - April 4, 2011 at 11:28pm

Just jailbroken my 3GS with new redsnow, I lost my network and Internet , any help

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