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 :)
HI Imran I am a bit new to the whole jailbreak and unlock, could you just confirm that if I use this method I can jailbreak and unlock my iPhone 3G to iOS4 and use it on any network?
Thanks for you time
Brett
Yes, you can!
So, I'm having redsn0w point to the final firmware released today (not the GM build), correct?
Yes
worked great. thanks a lot. couldn't believe how easy it really was. now that i have a jailbreak iphone can i still manage through itunes as far as backing up and installing apps and such?
Getting ready to do this to my iPhone 3GS. Are you sure I can jail break it, then Unlock it to use with TMobile?
You're welcome. :)
You can still use iTunes normally.
Don't do this on a 3GS. This guide works only for 3G.
Is there a jailbreak available for 3GS?
Should I restore my jailbroken iphone v. 3.1.2 first before updating to iOS4?
Nope
So i should just follow this guideline above for my iphone 3gs?
No. This wouldn't work with your 3GS
Hi there Imran, could you help me unlock iPhone 3gs if i upgrade it to iOS 4 without jailbreaking it?thanks…
it works on a ipod touch 3g??
Any recommendations on how i can update to iOS4 with a jailbroke 3gs without causing problems?
Hi Imran.. How do I download the iOS 4 and place it on the DESKTOP as you mentioned. Is there a link to download it (other than that in the iTunes)?
I have the iPhone 3G on 3.1.2 unlocked for T-Mobile. As long as I follow these directions I will have an unlocked 3G on OS4? If so that's amazing! Can't wait to do this!
Also I would like to know whether I should use it or not because my iPhone 3G is already unlocked/jailbroken.. I don't know which software was used for this but I can tell u that in my phone I have Blackrain (however u spell it), Cydia, and Rock.
Works like a charm. Thank you so much!
did as u said, however, cydia won't open because my wi-fi is “greyed” out…how do i fix this
I have a Iphone 3g, which was locked with 3.1.3.
I followed the steps as mentioned, now I am stuck with a black screen at jail breaking saying “waiting for reboot”
Please advise.
Just restart the proccess, the same ting happend to me.