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]](https://cdn.ithinkdiff.com/wp-content/uploads/2010/06/Screen-shot-2010-06-22-at-4.59.42-AM.png)
Jailbreak and Unlock iOS 4
- Download iOS 4 for your iPhone 3G. Place it on your desktop for easy access.
- Download redsn0w 0.9.5b5-4 [links at the end]. It’s available for both Mac and Windows.
- Download and install iTunes 9.2
- Now connect your iPhone 3G to your computer and using iTunes, upgrade to iOS 4. Do this the official way as described here.
- 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]](https://cdn.ithinkdiff.com/wp-content/uploads/2010/06/Redsn0w-0.9.5-Beta-511.jpg)
- Once you’re done and the iPhone reboots, you should have a jailbroken iPhone 3G.
- 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!
You're welcome. Glad to have helped! :)
Because this version of redsn0w works only with iPod Touch 2G and iPhone 3G.
Im kind of new to this, need a little help. If i just want the extra features like the wallpaper and multitasking, do i have to do the ultrasnow? and i don't understand the cydia part. thanks!
I'm only putting this here because it won't let me post a comment. Ok so I'm using an iPhone 3G that i updated to 4.0 through iTunes. I downloaded the newest beta of redsnOw and iPhone1,2_4.0_8A293_Restore. When I try to run redsnOw it says “Unable to Recognize specified IPSW”. I've read every comment on this page and I don't get why it's not working. Help?
Have you downloaded the final build of iOS 4? and redsn0w ? ( using the links in the post )
ultrasn0w is needed for carrier unlock.
does this work for already jailbroken iphone 3g with baseband 3.1.2
please help me yaba i update 3gs to 4.0 and now i can not jailbroken it help me so i can unlocked it please email me at maclook2@gmail.com please yaba
Yeah, I used both of the links from the page. I had no problem getting iOS4 on it from iTunes and redsnOw didn't work so being desperate to get it fixed I did Shift+Restore through iTunes and used the final build I downloaded from your link in hopes redsnOw would recognize it then and it still didn't work. Any more ideas?
how long should it stay on the “downloading jailbreak data..” screen????
I can't connect my Cydia to internet. It says “Unable to load (The Internet connection appears to be offline.)”. I'm conected via WiFi since I'm trying to unlock the phone.
i have the same problem
did you solve it
i need help ?!!!!!!!
Thank you very much. It worked perfectly!
it doesn't work on itouch 2g MC models ………….
why is that ???
Thanks! This worked great for me. Moved to Argentina this year, but had already done the 3.1.3 upgrade. Been waiting until now to be able to use my iPhone on a local carrier.
Hey just wondering if screen lock is included in this jailbreak, very important as its probably the main reason why id jail break my iphone 3G
PERFECT!! Thank You!! Keep doing what you are doing!! :D
Thank you very much. Everything works just like described, i followed all the steps above and it is great! Only, iBooks seems not to be working at all. Hope for a fix soon :D
i cant finf iOS4 on my pc.help!
Hey, I do as RS says but after reboot and while saying “Uploading ramdisk” it just stays freeze, some time after 3 lines and others almost at the end, tried few times, what's wrong? or should I just wait? it seems to take for ever.
Thanks
I have completely jailbroken and unlocked my iphone 3g. 1 problem so far…
I can not get the Cellular Data Network settings tap to come up.
Settings>General>Network>(No tap)
I do have the ability to turn CD on and off… as well as data roaming.
any help?