Instructables

Easy Jailbreak for your iOS 4.2.1 iPhone/iPod

Picture of Easy Jailbreak for your iOS 4.2.1 iPhone/iPod
Have you been searching for how to jailbreak your iPhone/iPod TOuch on firware 4.2.1? Well your search ends here! This a tutorial on how to jailbreak your iPhone/iPod Touch in less than 10 minutes!
**NOTE: I AM NOT RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOUR DEVICE.**
Feel free to ask me any questions.

Items Needed:
1. Computer
2. iPhone/iPod Touch on 4.2.1
3. Internet Access
4. Apple Connector Cable (Battery Charging Cord)
 
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Step 1: Preparing to Jailbreak

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First, you should sync your device with iTunes and back it up, just in case something goes wrong.

Step 2: Jailbreaking

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Go to www.Greenpois0n.com and select the operating system you are using, and run the file when it finishes downloading.

Step 3: Enjoy your Jailbroken iDevice

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Follow the instructions in the program, and then you're jailbroken! You will have an app called Loader on your Springboard. Run it, and you will have Cydia.
tbone1213 years ago
I did this jailbreak about 2 weeks ago when it first came out for firmware 4.2.1 and it wouldn't let me get installous. I'm thinking its a bug in it, because its the newest jailbreak, but that was a real big problem for me. I took the jailbreak off of my iPod now. I'm hoping that this bug will be fixed. Does anyone else have this problem?
Ariskis (author)  tbone1213 years ago
I have Installous, and is now fixed. I jailbroke my iPod Touch 3G the day the Windows Jailbreak for 4.2.1 came out. Try it out now, it should work.

When I try to install it, it says "Product configuration is missing!"

I try to go to www.greenpois0n.com , yet internet is telling me the page no longer exists... SOMEONE PLZ HELP! I have an ipod that i want to add other apps on, but all i have is music, and i have had this ipod for 6 years now, with only music on it...

lideyaj034 months ago

It worked... Deym...

how safe is this jailbreak and will it slow down my ipod?
Ariskis (author)  ipod touch 4g3 years ago
It is very safe, there is a very low chance that it may not allow your iPod to connect to the computer, but that is a 1 out of 1000 chance that that may happen. It might slow down your iPod, depending on how many GB's it is. But there is an app called Speed Intensifier, which speeds up your iPod greatly.
my ipod is 8g's will that slow it down
Ariskis (author)  ipod touch 4g3 years ago
Only if you install Winterboard, and load it up with Cydia apps. but then again, you could always download Speed Intensifier.
that doesnt always work though. remember that the more tweaks and apps you have running at the same time, the less amount of free ram will be available.
waterlubber2 years ago
I tried over and over again but it doesn't work. I just get "Try Again" after greenpois0n. I followed the steps. I hate apple! Please help!
robot+more3 years ago
i have used green poison before and it worked but now i updated to 4.2.1 and jail broke it but it wont open cydia it just crashes can u help me

ipod touch 2g 8 gb 4.2.1 unjailbroken
adsandy3 years ago
It ruined mine. It won't turn on.
tbone1213 years ago
OK. Thank-you very much. i hope it works. but ill backup my ipod to itunes first jjust in case.