Jailbreak and Unlock iOS 4 on iPhone 3G using redsn0w [Guide]

iPhone

iOS 4 was released earlier today and the iPhone Dev Team was quick enough to release an ultrasn0w unlock for it. Thanks to the unlock, and the recently released redsn0w 0.9.5 beta 5, you can install, jailbreak and unlock iOS 4 on your iPhone 3G. Make sure you follow the instructions correctly.

Jailbreak and Unlock iOS 4 on iPhone 3G using redsn0w [Guide]

Jailbreak and Unlock iOS 4

  1. Download iOS 4 for your iPhone 3G. Place it on your desktop for easy access.
  2. Download redsn0w 0.9.5b5-4 [links at the end]. It’s available for both Mac and Windows.
  3. Download and install iTunes 9.2
  4. Now connect your iPhone 3G to your computer and using iTunes, upgrade to iOS 4. Do this the official way as described here.
  5. Now that you have iOS 4 final build on your iPhone 3G, you’ll have to jailbreak it by using the iOS 4 with redsn0w 0.9.5 Beta 5. Click browse and point it to iOS 4 firmware and follow the instructions on the screen. Remember to enable battery percentage, wallpapers and multitasking. [Vista users might need to run redsn0w as administrator] Jailbreak and Unlock iOS 4 on iPhone 3G using redsn0w [Guide]
  6. Once you’re done and the iPhone reboots, you should have a jailbroken iPhone 3G.
  7. Now go to Cydia and add the following repo http://repo666.ultrasn0w.com. Check here for how to do this. Search for ultrasn0w 0.9.3 and install it and reboot again. Your iPhone 3G is now carrier unlocked. Also remember to add this repo to Cydia http://apt.saurik.com/cydia-3.7.

Download redsn0w 0.9.5b5-4

  • Mac OSX (x86)
  • Windows

To fix and enable Push Notifications on your hacktivated/unlocked iPhone, follow this guide.

UPDATE: the guide has been updated to reflect the recent release of redsn0w 0.9.5 beta 5-4 which fixes the iBooks issue that users were reporting.

If you face any issues, don’t hesitate to ask us in the comments. We’ll be glad to help!

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305 comments

  2. same here..error says unable to recognize firmware with redsnow. what should we do? help plss

  3. the repo has the number 0 instead of the letter zero…hope this helps

  7. Why did this not work for me? The whole procedure works fine but still the phone is locked to mtn-sa.

  8. Hello I have just bought iphone 3gs 16gb 3.1.3 from ebay last week. when i attech iphone with my computer it ask me to upgrade itune and i did upgrade itune. since that it lock my phone up and i can not see any more cydia and i can't receive call or dial call. so would assist me what should i do to use my phone again. would you please please help me. I live in small town call wilkesboro north carolina next to hickery, lanor, boon. i ask many people in this town but no one has any idea how to work my phone back. this was unlock phone and i use t mobile service and after i upgrade itune it shows version 4.0 on my iphone my cell 704-957-5010 my name is Ricky Patel please help me if you can. or give me some kind of advice where, who, or how can i fix my phone back to work.

    thank you

  10. Pingback: Newbie question about selling a unlocked phone! - TiPb iPhone, iPad, iPod Forums

  11. i used redsnow 0.95-5-5 smth like that, and it worked. i found it in a youtube tutorial, a guy holding his 3g in front of a sony vaio.

  12. Pingback: Newbie question about selling a unlocked phone! | iPad Forum
  13. Pingback: Jailbreak your iphone 3G with IOS4 and Multitasking | Blog Engage

  14. Yes you can Downgrade with itunes just restore yout iPhone and use the 3.13 Data

  15. I have a problem with jailbreaking my iphone ios4 with Redsnow 0.9.5b5-1. After it ran through the whole process, it freezes at the end saying waiting for reboot which takes more than 30 minutes. Please help. Thanks in advance.

  17. Thanks for this guide. The unlock operation went smooth on my iPhone 3g with the latest software. Keep up the good work.

  20. when i try to download the red snow the page width say bandwith exceeds or something

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