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!
nevermind,found it and it works like charm~ thanks~
it doesn't work for me!! i follow the steps and i still get the connection screen after redsnow is done
same here! i keep getting “Did not Find Repository” when i add the 'repo666.ultrasn(zero)w.com' link in my sources…i live in UAE, so does it have something to do with the site being blocked here?
I just wanted to thank you for the great walkthrough and the links to everything that was needed. You made it so easy that anyone could do jailbreak their 3G. Keep up the good work.
I have a 3g phone was unlocked to from rogers to bell. I undated to 4…now stuck on connect to itunes…says bell card is not compatible. Any suggestions
I freaking Love You! My first Jailbreak ever and it went off without a hitch (Okay that power button holding activity was a bit difficult to get right, but it worked in the end). Awesome! I went from 3.1.2 on a 3G and I'm on T-mobile without any issues (accept that “0” in ultrasn0w is actually a “0” the number, not the letter: who knew!) Thanks a million!
Help! I've followed the directions. When I browse for the iOS 4 on my desktop, I select it, but then the redsn0w says “Unable to recognize specified IPSW.” What's going on???
so everytime i install ultrasnow and reboots, the sim card still says locked sim? is anyone else having this problem as well?
Me too and Ive tried both red and pwnage. Any luck?
Works great after a few frustrating attempts.
Use Redsn0w 0.9.5b5-3 NOT -0.9.5b5-2!
Download final iOS 4.0 using Firefox NOT internet explorer! (IE will not allow you to see the file as IPSW.
When holding the home button, continue holding it all the way through uploading Ramdisk. If i let it go on the prescribed time, ramdisk stopped uploading.
Cydia works after a reload
MyWi and My3G works
Lockinfo works
Rock works
Still working on PDAnet and Cycorder and Intelliscreen
and, will the Redsn0w 0.9.5b5-4 have the battery percentage? so i assume im supposed to use Redsn0w 0.9.5b5-4 right? what is http://apt.saurik.com/cydia-3.7 gonna do ? because you said dont forget to add this repo. and i just skip the ultrasnow part and move on to http://apt.saurik.com/cydia-3.7 part? what to do next? can i still download apps after i jailbroke?
I keep trying to restore and update the phone with the OS4 but it keeps giving me error 1604 and error 2003… PLEASE HELP!!!
I have a jailbroken 3gs. i upgraded my Os to iOS 4 using iTunes and then tried using redsn0w 9.5 but it gets stuck in the last stage of rebooting. later i realised that 9.5 is for 3g n not 3gs. Please help me out in jailbreaking my fone. Its stuck :(
multitasking is not working for me…the lowest row moves up but i don't see any icons of the still open applications..please help
mee too, any suggestions – might it be a jailbroken app causing this???
my iphone stuck with first with white screen and now black screen after jn with redsnow..help
i book is an application which has to be downloaded from app store….
redsnow says it does not recognize the .ipsw file specified ..
y is tht ?? :(
i have the same problem did u figure out a soution
so, Imran. you have your RedSnow link broken. is it still possible to do the jailbreak? i mean is Redsn0w 0.9.5b5-4 is gonna work? i have my iphone 3g factory unlocked so, what to do with the ultrasnow thing? help please. thanks a lot!
Yes. I'll update the link in a moment. The new redsn0w release fixes the iBooks issue. You don't need ultrasn0w because your phone is factory unlocked
hi there imran…i pretty need some help…i would like to update my 3gs to iOS 4…what do you mean by factory unlocked coz i bought mine already unloacked…im just scared maybe it might get locked if i update it…thanks for the help!!!
factory unlocked means that the iPhone will work with any carrier without the need of jailbreaking or unlocking. Do you know if your iPhone is jailbroken/unlocked?
so, i'm supposed to use Redsn0w 0.9.5b5-4? after step 6, what should i do? should i restore my iphone 3g before i jailbreak it? thanks man.