The Chronic Dev Team released their untethered jailbreak, Greenpois0n for iOS 4.2.1. This jailbreak is now available for Mac and Windows users.
If you’re on Windows, you can follow this brief overview on how to jailbreak with Greenpois0n. As always, do your research, and then proceed at your own risk.
This guide will jailbreak your iPhone 3GS and iPhone 4 on iOS 4.2.1 on Windows (click here for the Mac tutorial).
Preparation:
– sync your iPhone in the latest version of iTunes.
– if you NEED your iPhone unlocked, do not update to iOS 4.2.1 via iTunes (you should know this by now).
1. Download Greenpois0n for Windows here to your desktop and launch greenpois0n.exe
2. Turn off your iPhone. In Greenpois0n, click “Prepare to Jailbreak (DFU)”. Now you will get instructions on how to enter DFU mode.
3. You’ll be asked to…
– press and hold the Sleep button (2 seconds)
– continue holding sleep; press and hold Home (10 seconds)
– release sleep button; continue holding Home (15 seconds)
4. Once you’ve entered DFU mode, click “Jailbreak”. Greenpois0n will now work its magic and jailbreak your iPhone 3GS/4.
5. Once finished, click QUIT in Greenpois0n. Some text will scroll on your iPhone’s screen and will restart.
6. After the restart, you’ll notice the Loader app on your homescreen. Launch it.
7. Select Cydia, and then tap Install. Once finished, hit Options and tap Remove Loader.app
8. Restart iPhone, load Cydia and install updates. Done!
Let me know how this brief tutorial works for you. If it fails the first time, you probably did not enter DFU mode correctly. Try again.
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Great Post Bro, Thanks alot. Love from Bahrain! 🙂
You’re welcome!
So if you have 4.2.1 already installed,Can you unlock it or no using ultrasnow?this is an iphone4
Does anyone know if iPhone 3G is supported?
i never tried this but hoping it would be way better that Redsn0w
If you are on 4.2.1 already you can just ru greenpoison .There is currently no unlock available.
Is it worth waiting for iOS 4.3 ? or should I just jailbreak it for 4.2.1?
This is a common stupid question everyone keeps asking. For one, you can’t Jailbreak 4.3 yet. Also, other than the built-in hotspot feature (which you can alredy get via MyFi on Cydia), no it’s not worth “waiting for” and upgrading to. Jailbreak 4.2.1 NOW, and don’t upgrade to 4.3 until a Jailbreak is released for it in April or so. ‘Nuff said.
3G was supported many moons ago.
It is usually the first iDevice to be jailbroken when a new iOS is released.
Dont use Greenpoison though. Try Redsnow
anyone else having trouble unzipping? I keep getting message it is a virus
DO NOT USE GREENPOIS0N, twice now trying to jailbreak its bricked the iphone. This update is not fully working yet with iPhone 4. Bewarded, I’ve been doing this since the 3G day’s so I’m not new to this.
Yep I did as well and turned off my AV software and then this wonderful GreenCRAP bricked my phone twice. Its awesome now I’ve lost my jailbreak. Dont run it
Everything was very smooth. Thank you so much iphoneincanada and dev-team!
It’s working fine.
I’ve done two iPhone 4 and a 3GS.
It’s working fine.
I’ve done two iPhone 4 and a 3GS.
Yep two iphone 4 done no problems!
So I bought my iPhone outright and unlocked and I noticed that the warning says do not jb if you want to unlock your phone. I don’t want to loose my unlocked state will jbing affect that
That doesn’t apply to you. Go on, just jailbreak it, urs will still remain unlocked
Err I should be more clear and say that my iPhone is a factory unlocked iPhone
If you bought your iPhone unlocked, then you’re safe. It will always be unlocked
You’re obviously doing something wrong. Works fine on my iPhone 4, and thousands of others have had success. It’s only the idiots that don’t follow directions properly that are having problems.
Yep, you’ll be fine. There is no way to lock a factory unlocked phone just by jailbreaking.
Does it show skull apple for everyone else too?
I jailbroke my phone to iOS 4.1. Do I have back up my apps & other programs from Cydia before jailbreaking to iOS 4.2.1
Please help, jailbreak rookie.
Yes
did mine before the update, on a mac. it had a few issues, but after a couple of tries worked ok. If you think you “bricked” the phone, then you obviously haven’t been doing this as long as you said, or don’t know what you are doing. worse case, you update back to 4.1 or 4.2. or use Redsn0w. In fact i had issues with the loader as well, and just used redsn0w to put on cydia. Its really hard to actually “brick” the phone, but then again i am not sure what your definition of brick is.
Anyone else stuck in safe mode after this? I am and I can’t seem to get out of it. Ideas?
Doesn’t redsnow require tether?
Safe mode on your computer or iDevice?
On my iPhone.
Oh ya; and I never got the loader app on my homescreen either, but I was already jailbroken with redsn0w and had to jailbreak over my greenpois0n to get my phone to boot. It was stuck in the “connect to itunes” screen.
If you’re JB with Redsnow, just run greenpoison. Loader won’t be there cause you already have Cydia
I ran greenpois0n and it stuck my phone on the screen with the USB cable and the iTunes logo. I had to JB again with redsn)w just to get my phone to work. Now the springboard is stuck in safe mode and won’t fix. Cydia won’t update either.
That’s a bit creepy but mostly lame shameless plug.
For 3G, or an old-bootrom ipt2g or iPhone 3GS, redsn0w is untethered. It was only tethered for the newer-bootrom iPhones/iPods (later 3GS/iPhone 4).
On Cydia Changes Refresh, I Get:
Updating Database
Downloading Release
Error: POSIX : Operation Time…
Downloading Release.gpg
Downloading Release
then it Reloads Data and its done.
Is the POSIX: Operation Timed out an issue I should be concerned with?
First time jailbreaking, and it seems to have worked very well. It failed the first time, so I reset my phone, tried again and it worked. I apparently just didn’t enter DFU mode correctly.
Thanks Gary!
works fine now…
Maybe an overloaded server over weekend.
Great Jailbreak. Simple to use, no problems.
Worked like a charm! Thanks for the super easy walkthrough!
I need help… when the screen scrolls… The last line says “panic: we are hanging here…” what does that mean? Please help
And the screen just sits there?
I get the message… panic: we are hanging here. What does that mean?
Probably need to redo the process.
Hard reset and redo.
H… the screen this sits there. I did a hard reset and tried it again and it froze in the same place with the same message.
This works great. Never did a jail break before. Screwed up the first time and it just sat there, so I did it again and it worked like a charm.
greenposiOn works great.
Only down side is, I find Cydia does not have much there of any real use… just a few things.
Nice work!
Download SBSettings, Five Icon Dock, biteSMS, MyWi, and My3G to start.
Having a weird issue with my Safari crashing. It started about an hour ago. Strange since I’ve been running the JB with no issues since it came out. Anyone else?
Did you get it working??!
Nope.. not working yet! Same panic message
I have tried about 10 times, with no success. I must be an idiot as soooo many people seem to make this sound easy. I follow the prompts but the loader just sits there, then the green progress bar goes quickly across, finally I get “Jailbreak Failed :(“