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 should upgrade to iOS 4 before jailbreaking it using redsn0w.
Yup. that repo address will add sources etc to Cydia. You can download apps after jailbreaking.
I have a jailbroken 3G 3.1.2 How do I upgrade to os4? Do I follow the same steps as above?
cool. you're really helpful. and some more questions. after i update to iOS 4 from iTunes, should i restore it? because some sources said so. And is it gonna succeed? 100%? i am surely gonna get multitasking, wallpapers and cydia. what about battery percentage?
do this work on 3Gs?
I did the whole process and it worked perfectly and I now have an unlocked and jailbroken iphone 3g working with tmobile. My only issue is that the battery runs out VERY fast. I took it off the charge when it was at 100% and was just chatting on facebook for about 10 to 15 mins and my battery had already gone down to 51%. I don't know what I should do.
Hey guys, if you had problem like I did, just run redsn0w in compatibility mode for XP(in windows 7) then every thing works fine.
JBed and unlocked.
Thanks for guide.
the adding http://apt.saurik.com/cydia-3.7. part turns out failed. so, what should i do Imran?
Hey Imran, Thanks for the guide. I just have a couple of questions. After installing iOS 4 successfully on my iPhone 3G, when I restored all the apps back to the phone, the apps that I downloaded from outside the iTunes i.e. the cracked apps from appscene.org etc. don't transfer to my iPhone now. can you tell me what I'm doing wrong here?
try this…..it worked for me on my 3g
http://discussions.apple.com/thread.jspa?thread…
try this…it worked for my 3g
http://discussions.apple.com/thread.jspa?thread…
not yet… Dev-team is trying to find a way…
try running it in XP compatibilaty mode..
hello dear
how are you
i have 3g 16gb 3.2.1
with modem fram 4
locked …
i was jailbreak it and unlock network he come factory not sim-free
can i update to ios4
please mail me if you can : samitouri@msn.com
i stuffed up as well and now my 3gs is stuck on new 4.o firmware from itunes i hope they jail break it soon !!!
I did the whole thing over again (restore, jailbreak, and unlock) and it resulted in the same thing, the batter goes from 100% to 0 % within 20 mins … PLEASE HELP!!!
hey Imran. I got my 3g jailbroke. everything works fine. but i dont see where to enable the battery percentage. help please. thanks
Go to settings > General > Usage. You should see the option there.
what happened to the MMS? in messages, i can't attach photo anymore.
rtj did you fix the mms issue?
no. mms is totally disabled. i got my iphone restored to iOS4 without jb and MMS works fine until i back up my data. and actually even you didnt jb it, you still have mms issue unless you set your iphone as a new phone and don’t back it up. that really sucks. i hope dev team will find the solution soon and i’ll jailbreak it again to have wallpapers, battery percentage and multitasking + working iBooks and MMS without any more bugs.