How to Unlock the iPhone 3G iOS 4.0.1 with UltraSn0w

By , Jul 15, 2010

Unlock iPhoneThe latest firmware update that brought us iOS 4.0.1 did not update the baseband which remains at version 05.13.04. This means that if you have an iPhone 3G, you can jailbreak iOS 4.0.1 and unlock your it with UltraSn0w.

Step 1: You will have to jailbreak your iPhone 3G iOS 4.0.1 first.

Step 2: Then simply add this source to Cydia: http://repo666.ultrasn0w.com. More details here.

Step 3: Finally, search for “UltraSn0w” in Cydia and install the application. Reboot your iPhone, and you’re done. You can now use your iPhone on a different carrier.

There is no iOS 4 jailbreak for iPhone 3GS and iPhone 4 yet but I guess it’s just a matter of time now.

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  • Angel

    Has anyone test this yet? ios4 make my 3G so slow, stuck, freeze… will this one be better? i’m kind of scare that it might totally stuck and freeze :( let me know please… thank you

  • Yuumoon

    How can I change imei number for iPhone 3GS, because my iPhone has some problem with imei number.

  • Z

    @Angel if you are already running iOS4 which makes your 3g slow, this update won’t make a difference. It will still be slow. However, you may want to google ‘speed up iPhone 3g’ and look into removing language packages and some daemons. I read that it should improve your iphone’s performance up to 25%

  • Tasha

    Can anyone confirm that this jailbreak/unlock is working fine and smoothly?

    • Sohail

      Yes the unlock specially work well for the iPhone 3G if you have 3 GS PLEASE DONT go with the jailbreak.man thanks to the DEV team…
      Keep it up guyd

  • http://www.twitter.com/gurpswu Gurps

    It works fine, jailbroke with redsn0w and unlocked with ultrasn0w. Using a iPhone 3G 4.0.1

  • Tasha

    No apparent problems?
    Did you lose anything? Data? Contacts?

  • http://www.twitter.com/gurpswu Gurps

    No because I completely restored my 3G and upgraded to 4.0.1 before I jailbroke and unlocked it.

    Just back up your stuff before doing it.

  • Tasha

    Oh. If I don’t do a fresh restore, will I lose anything?
    So you restored your backup/data into your phone after the unlock?
    Sorry for the questions! I’m new at this!

  • http://www.twitter.com/gurpswu Gurps

    I didn’t backup anything myself as it was an iPhone that didn’t have any info on it.

    I’m sure you will have no problems if you follow the instructions. Have you jailbroken your device yet Tasha?

  • Tasha

    I haven’t, but I plan to tonight.
    I’m just doing my research before I take the jump!
    I’m currently downloading the needed files.

  • http://www.twitter.com/gurpswu Gurps

    Okay just to clarify. Update iphone to the latest firmware. Then download the 4.0 ipsw from this site & run redsn0w reading all the steps carefully.

  • Tasha

    Alright. Thanks for everything Gurps!

  • Tasha

    Redsn0w can’t process the firmware.
    “Unable to recognize specified IPSW.”
    Gurps, did you have this problem?
    I am sure I downloaded the correct firmware.

  • http://www.twitter.com/gurpswu Gurps

    I didn’t have that problem..are you using RedSn0w 0.9.5b5-5? That’s the latest version..ensure you are using that version of redsn0w.

    The ipsw you should have downloaded has the filename “iPhone1,2_4.0_8A293_Restore”.

  • Tasha

    Oh. I downloaded the 4.0.1 firmware! Okay. I see my problem.
    You are amazing Gurps!

  • http://www.twitter.com/gurpswu Gurps

    :)

    Let us know if it works.

  • Tman

    This is wrong… “There is no iOS 4 jailbreak for iPhone 3GS and iPhone 4 yet”.

    I’m running iOS4 on my 3GS and it’s jailbroken and unlocked. I used Sn0wbreeze and Ultrasn0w.

  • Tasha

    Wow. iTunes was backing up my iPhone and it took incredibly long! I don’t have the time to finish it so I’ll jailbreak and unlock my iPhone at another time! Thanks Gurps for the help!

  • Jason

    After I install ultrasn0w, it says different sim installed. What am I doing wrong?

  • http://www.mobile-geeks.com geek

    Quick Tip: Its zero in ultrasn0w address and not O, http://repo666.ultrasn0w.com

  • essex dragon

    Thanks worked fine once upgraded to 4.01

  • takean

    I can’t get mine to jailbreak at all. I have tried numerous times now and to no avail. It sometimes locks up and sometimes will go all the way to the screen with “downloading Jailbreak data”…but the iphone always turns off after about 20 to 30 minutes…and no matter how much longer i leave it…even 2 hours, it doesn’t complete it for some reason. When ever I boot it up, no cydia, nothing. so not sure what i’m even doing wrong…lol.

    I have followed the previous instructions for the 4.0 jailbreak as well as these newer ones for the 4.0.1 and none of them work. I have tried the latest redsnow as well as a few earlier versions before that were supporting os4 and nada. If someone can help me out here I sure would love it.
    I have a 3g 16gb. I’ve jailbroken it many times before for earlier firmwares…but this one I just can’t seem to get done.

  • Lucas

    Is there still Any issue with people who use Spirit for3.1.3 if you use the new redsnow for ios4 (3G) i dont Want to update cause its too slow and not the half of jailbreak app i use are not update yet (mewseek and cycorder and more) this is for a freind that always want thé new thing….
    And when i first try 4.0 (go back to 3.1.3 the day after) i use redsnow multitasking ans background option did someone try without it ?is it as slow as if you didnt chek those option

  • Ed

    How do you bckup your iphone im on 3.1.3 and havent upgraded to IOS4 yet cause i dont have a AT@T sim casrd when i refresh it its unlocked and jailbroke now so how di i down load new software help please im using spirit for jailbrake

  • LeS@M

    Iphone 3G Jail broken and unlocked before to 3.1.3. Now I have upgrade to IOS4.0.1 and my iphone was locked. I have succesfully jailbroken it. But I am experiencing problem to unlock it.

    Cydia is not accepting the source http://repo666.ultrasn0w.com:

    message: “Did not fin repository”: The indicated repository could not be found> this could be because you are trying to add a legacy installer repository ( these a re not supported).

    I am conected to Wi-fi. I press Ok. Nothing happens.

    Before I use to have other message with all the repositories: Bigbpss ATP, etc…

    Now when i Open the Cydia it says unable to load the internet conection appears offline.

    Any help??

  • Laser101

    Iphone 3G jailbroken and unlocked before on 3.1.3.
    Now, I have moved to IOS 4.0.1 and I succesfully jailbroken it with redsn0w 0.9.5b5-5.

    I’m having problems unlocking it as well….

    I am connected to the internet via WiFi but Cyndia keeps telling me that :

    “Failed to fetch http://repo666.ultrasn0w.com/ ./Release.gpg POSIX: Connection refused
    Failed to fetch http://repo666.ultrasn0w.com/ ./en.bz2 POSIX: Connection refused
    Failed to fetch http://repo666.ultrasn0w.com/./Packages.gz POSIX: Connection refused

    Some index files failed to download, they have been ignored, or old ones instead.”

    Someone can help?

  • Laser101

    Everything works fine this morning…!

  • http://225designs Mister225

    hey Laser101 what does it do different?

  • Laser101

    Nothing different from the first time… maybe the server was down when I tried.

  • Steven

    Do I download the iTunes 4.01 software from apple and will redsn0w and ultrasn0w work, I’m scared to update I’m on 3.1.3 on iPhone 3g running on tmobile

  • mag

    hey, i have just jailbreak my iphone 3g and it worked, i tried to unlock it, i install ultrasn0w and everything and reboot, but when i put my sim card, it won’t work :( can someone help me ?

  • Sam

    i am also having same problem like LASER101 please can anyone help i am not able to add repo666.ultrasn0w.com in cydia……can anyone tell me what to do to add it? i am getting same errors like LASER101 got….

  • hung nguyen

    me too can unclock after jailbreak ! put t-mobile sim card it not work. ???????

  • AR

    i have a jailbroken iphone 3g 4.0.1
    Modem 5.13.04
    i have added and successfully installed ultrasn0w 1.1-1, but the unlock will not work (tmobile)!?!?!
    anyone have any suggestions, i dont understand why it won’t work?

  • Rev. Mawuli

    HI AM REV. MAWULI FROM GHANA IN AFRICA,
    I WANT TO KNOW WHY AFTER JAILBRAKING MY IPHONE 3G THE SIM CARD CAN NOT BE ACCESSED.
    THE SIM CARD IS NOT WORKING IN THE IPHONE AGIAN BUT IT WORKS IN OTHER PHONES,
    CAN YOU PLEASE ASSIST ME,
    I NEED YOUR ASSISTANT,I CAN NOT PAY WITH PAY PAL OR ANY ACCOUNT APART FROM MY BANK ACCOUNT,
    PLEASE YOUR RESPOND IS VERY DEAR TO ME,THANK YOU