After weeks of anticipation, the Dev Team released a jailbreak for iOS 4.3.1 tonight, thanks to iPhone hacker i0n1c. This jailbreak will work with iPhone 4G, iPhone 3GS, iPod Touch 4G, iPod Touch 3G, and the second generation of Apple TV.
In this step by step guide and tutorial, we will show you how to jailbreak your iPhone 4.3.1 using RedSn0w. RedSn0w is a jailbreak that works both for Mac and Windows. Unlike PwnageTool, RedSn0w updates your baseband, so this is probably your preferred jailbreak method if you don’t rely on an unlock….
If you do rely on an unlock, we suggest you use PwnageTool. At any rates, you should read this post before doing anything.
Step 1: Make sure your iPhone is on firmware 4.3.1.
Step 2: Download RedSn0w 0.9.6 rc9 from our iPhone downloads section. Save it to your desktop. Also download the iOS 4.3.1 firmware for your iPhone and save it to your desktop as well.
Step 3: Launch RedSn0w and click Browse to select the 4.3.1 firmware you downloaded in step 2. RedSn0w will ask you if it is a newer firmware or not. Read the explanation and select an answer. In this tutorial, we will select an older model, but it doesn’t really make a difference. Once you selected Yes or No, click Next to continue.
Step 4: RedSn0w is now going to prepare the jailbreak data, which should take just a few seconds.
Step 5: RedSn0w will now ask you to select a few options. For this tutorial, we will only choose to “Install Cydia”, which is the bare minimum. You can also install custom boot logos for example, but this is just optional. Click Next to continue.
Step 6: RedSn0w will ask you to make sure it is plugged in to your computer and turned off. If it’s not, follow the onscreen instructions.
Step 7: Make sure you’re ready because RedSn0w will give you a few instructions to follow in order to enter DFU mode.
Step 8: If you successfully enter DFU mode, RedSn0w will now jailbreak your iPhone. You should see a bunch of funny code displaying on your iPhone, then you should see a pwnapple. It’s all good, relax and let the magic happen.
Step 9: Once done, your iPhone will reboot by itself. You should now have a jailbroken iPhone with Cydia installed.
Congratulations, you just jailbroke your iPhone in just a few minutes.

Just about 4 days after Apple released iOS 4.3.2 for iPhone, an updated version of the untethered jailbreak has been released earlier today by iPhone hacker i0n1c. This untethered jailbreak was used by the Dev Team who also updated their jailbreak tool RedSn0w.
In this post, we will show you how to use RedSn0w to jailbreak your iPhone on iOS 4.3.2. This jailbreak will work with any device on iOS 4.3.2, except for the iPad 2…
UPDATE: It seems that RedSn0w is having issues with the iPhone 4. If you have an iPhone 4, you might want to wait a bit for these issues to be worked out. The Dev Team released RedSn0w 0.9.6rc14 that fixes issues with the iPhone 4. The tutorial remains the same, just make sure to use the latest RedSn0w version available.
Keep in mind that to use RedSn0w, you have to be on firmware 4.3.2, which means you will update your baseband. In simple words, do not use RedSn0w if you need your unlock. Instead, wait patiently for PwnageTool, which will allow you to update to 4.3.2 while preserving your baseband for easy unlocking.
This is a simplified version of our RedSn0w tutorial. For full step by step illustrated instructions, please refer to our previous RedSn0w tutorial. Just make sure you download the right firmware for your device, along with the latest version of RedSn0w available.
Step 1: Make sure you have the latest version of iTunes installed. Make sure your iPhone is on 4.3.2. Download iOS 4.3.2 and RedSn0w from our download page.
Step 2: Launch RedSn0w and follow the onscreen instructions. These instructions are pretty straightforward and there isn’t much room for error. Again, for full tutorial, refer to our previous RedSn0w guide.
Step 3: RedSn0w will ask you to put your iPhone in DFU mode. Make sure you follow the instructions on the screen. This is a key part of the process. Make sure you hold the Power and Home button together for exactly 10 seconds. After 10 seconds, release the Power button and keep holding the home button until iTunes tells you it has detected your iPhone.
Step 4: If you’ve successfully entered DFU mode, RedSn0w will start the jailbreak process. Lay back, relax, as this process could take a few minutes. At the end of it, your iPhone will reboot. When it’s done, you will have Cydia on your homescreen.
Congratulations, you just jailbroke your iPhone 4.3.2.
UPDATE 2: If you tried this with your iPhone 4 and got stuck on Apple logo, you may want to try this fix.