The iPhone Dev team developer, Comex has just released JailbreakMe 2.0 (Star) tool to jailbreak iPhone 4, iPhone 3G and iPhone 3GS (including new bootrom) running iOS 4/4.0.1 firmwares. Though, one must note that this does not work with iOS 4.1 Beta release. JailbreakMe 2.0 is a userland jailbreak, similar to Spirit, which means you run it right in your iOS Safari browser and it will jailbreak the device. How simple is that?!

Just follow these step-by-step instructions in order to jailbreak your iPhone 4, iPhone 3GS or iPhone 3G device. One thing which is important to note here is that this jailbreak tool doesn’t hacktivate your device. You will need an original supported SIM card to activate your phone with iTunes. (Update: If you do not have original SIM, follow this video guide from RP to activate without original SIM)

Guide to Jailbreak iOS 4.0.1 on iPhone 3,3G,3GS Using JailbreakMe 2.0 (Star)

1. Backup all your data on the device using iTunes.

2. Update your iPhone 4, 3GS or iPhone 3G on the latest iOS 4.0.1 firmware with iTunes. Download iOS 4.0.1 here.

3. Open Safari on your iPhone 4, 3GS or 3G and navigate to

4. “Slide to Jailbreak” to begin the jailbreak process.


5. JailbreakMe will download some files it requires for jailbreaking.

6. Once the download is completed, it will automatically start the jailbreak process. Wait for it to complete


7. Once the jailbreaking completes, you will be greeting with a message saying “Cydia has been added to the home screen”

Voila! You now have jailbroken your iPhone on the latest firmware!

How to Unlock iPhone 4/3G/3GS on any baseband

Follow this simple step-by-step tutorial to unlock your iPhone using UltraSn0w 0.93 so that you can use it with any carrier you like. It is supported on all basebands upto 05.13.04.

Update 1: If doesn’t work for you then you can try out this alternative link:

Update 2: If you are looking for the guide to Jailbreak iPod Touch 3G/2G using JailbreakMe 2.0 Star, click here.

Update 3: Fix for Facetime and MMS issue on iPhone 4 after JailbreakMe Jailbreak

Update 4: If you are looking to jailbreak iPad using JailbreakMe 2.0 Star, here is the guide.

Also Read:

Raju is the founder-editor of Technology Personalized. A proud geek and an Internet freak, who is also a social networking enthusiast. You can follow him on Facebook and on Twitter. Mail Raju PP. Follow rajupp


31 thoughts on “[How to] Jailbreak iOS 4.0.1 on iPhone 4, 3GS New Bootrom with JailbreakMe 2.0 Star

  1. Hi!
    I have a question for you. I’ve an iphone 3gs jailbroken with 3.1.3. Do i have to update it with iTunes and then reJailbreak? Or is there any other procedure that i have to fallow?


    • You would need to backup your data first and then “restore” your iPhone 3GS by updating it to iOS 4.0.1. Then follow the above steps to jailbreak. The key is backing up of data

  2. FINALLY been waitingg for thiss, thank you so much for this new jailbreak, i have an iphone 3gs 32GB NEW BOOT ROM, and it finally worked, i didn’t wanna try any other jailbreak, but i took the patience and waited for thiss :D, THANKK YOUUU SOOOO MUUCHHH YOU GUYS ARE THE BEST 😀

  3. if I don’t have the official SIM and upgraded my phone, then how to start the phone and use safari (in order to jailbreak and unlock) ?

  4. thanks for the jailbreak, but mine asked to reboot device which i said yes then just gets stuck on ‘black screen & apple logo ‘ as if its booting up but gets stuck on there now for 20mins??? can u help???

  5. hi, I was do exactly the same so many times but my IP (3GS-4.0-new bootrom) just went back to home screen. You have any suggest?

  6. I have a question for you,mine already jailbreak but unfortunately still unable to install free software or games(those that i don’t want to buy).The massage says like this”unknown error occur (0xE8008001).

    • this is only for jailbreaking. Once you jailbreak, you need to unlock the phone (look at the end of the article for links) and you are ready to use any SIM including t-mobile’s

  7. Just a little confused, I have an iphone 3gs, but when I put it back in restore mode, how am I suppose to get access to safari to follow your guide of jailbreaking the iphone? I am just curious. Thanks

  8. i have a Iphone 3g and i cannot connect to any wireless networks is there anything that i could do so that i can fix this problem. thanks

  9. I have iPhone 3G and I did jailbreak after that when I try 2 sync with iTunes I get error 0xe8008001 and I have iso 4.1 … what should I do … plzzz can u help me :(((

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