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!
RAHIM, remember you have to install appsync in order to be able to install cracked apps. add the repo http://cydia.hackulo.us to cydia and get it from there. Then it should let you install everything.
I'm getting the same 3G problem. Everything works like wonders except for that. I can't get access to the internet via cellular data. I did the following with my iphone 3g 8gb
-Restored with original IOS4
-Jailbroke with redsnow 0.95
-Unlocked with ultrasnow 0.93
Everything works except for 3G or edge connection. Any clue?
This happened to me as well. I have re-restored to ios4 and re-jailbroke, but still no cellular data. I have tried manually uploading my carrier settings but all that will do is allow my visual voicemail.
@rahim, that would be the appsync 4.0 install that from cydia
HELP!!!! I followed all the directions and I unlocked and jailbroke my iphone 3g with the iOS4 but my battery keeps dying at an extremely fast rate. I restored the iphone and did the whole process again and again and ALL 3 times it resulted in the same result with the battery going from 100% to 0% within about 20 mins of talking on the phone. PLEASE TELL ME WHAT TO DO!!!
Can u unlock iPhone 4 yet
ive got ios4 installed on my 3g but step 5, when i browse i cant find the file to open with in redsn0w, any help?
imran,
can i use any application for jailbreak my apple i phone 3gs 4os, with my windows 7, pwnangtool is for MAC os but i have windows 7 .. so can u help me please
Hello Imran,
great guide my friend, however (isn't there always one of these or a but?) redsn0w just refuses to regonsie the ISPW. I've tried everything, downloaded the latest files etc, it just doesn't work. I have the latest iTunes, am on 4.0 firmware (baseband 05.23.04) used the 4.0 pwnage tool, rebuilt got the redsn0w and then nothing.
Any ideas?
Many thanks.
That happened to me as well. I had to restore/rejailbreak to get it working.
Use sn0wbreeze. https://www.ithinkdiff.com/how-to-jailbreak-and-…
There are many possibilities.
Wrong firmware.
Corrupt download.
Did you know the GM build and final iOS 4 build have the same names? You could check if you mistakingly downloaded the GM build.
Pwnagetool has been updated to 4.0.1 as well as redsn0w got an update. Did you try the latest versions?
i already tried with snowbreez 1.6.1 but there is no unlocker for 3gs 4os ..
there is a massage : Unfrnatly, We were unable to get permission from MuscleNerd, to include ultrasnOw in snOwbreeze. The reason is, it would be hard to maintain updates. if you really need to install it offline, then go to custom Apps, and refresh the http://repo666.ultrasnOw.com tab. then select ultrasnOw.
so is there any posiblity to unlock my iphone 3gs with 4os .. can i use my i phone .. i am india right now and using vodafone sim card.
well, follow that guide. and when sn0wbreeze asks you if you want to activate the pone do that.
This will make sure that you don't get the no sim messge and you'll be able to use the iPhone without a network. Then using wifi, fire up Cydia and add that repo. install ultrasn0w from it and restart your iPhone. It will work then.
it works good job
I did this process without any problems. I got a bit scared when I re-opened iTunes after the process, and without asking it started “Restoring Iphone” – but it means the apps, mail and sms settings and stuff, not restoring to the ISPW that it created during the first part of the process.
PS on my phone I did not get the white icon for Cydia, although it did 'reorganize' itself and this took a while. Great work!
So thanks very much, amidst the plethora of guides on how to do this, im glad I found a good concide flawless guide to JB + UL my iphone 3G when upgrading to iOS4. Well done guys.
Hey Imran great guide. Everything works -the mms and thether. Can you confirm those are issues ?
Also note I did jailbreak twice today the first time I noticed MMS was screwed up, so I download APN after APN. The only thing that did was break Visual Voice Mail, Internet and everything else. So just a note that if you Jailbreak and the only things not working are MMS and the tethering is not visible you are doing good. Screwing with the APN can make things worse.
hey imran,
the jailbreaking and unlocking process worked great. Had no problem doing that. But i got a problem using the unlocked iphone. When i put in my sim card, it says “searching” forever then changes to “no service”. Got any advice??
I am having the same issue on my 3g iphone. “No Service”
bummer.. cant even open the downloaded redsnow. says “you cannot open the application redsnow because it is not supported on this system.” HELP
Steve, I don't use MMS myself ( I rely on a facebook, email and
twitter to share media ) but a lot of people have sent in the MMS
issue reports. I use MyWi for internet tethering but the app is
getting an update to work with iOS 4. But since people are reporting
these issues, they must exist.
Did u reboot your iPhone after installing ultrasn0w?
Which OS are u using?
hi
how can i restore ipsw of ios4 to my iphone 3g