Unlock iOS4 iPhone With Ultrasn0w 0.9.3

Ultrasn0w has been updated to version 0.9.3 and will allow you to unlock your running iOS4 with baseband between 04.26.08 thru 05.13.04.

Ultrasn0w iPhone iOS4 Unlock

Ultrasn0w 0.9.3 is available in Cydia stores using the repo repo666.ultrasn0w.com. To add a repo go to the Cydia store and add it as a new repository. Read instructions to learn how to add a new repo to Cydia.

However, before you unlock your iPhone, you will have to jailbreak iPhone . The only tool that can jailbreak right now is the redsn0w tool, which is available for both Windows and Mac users.

The Cydia store will only be available after you have jailbroken your iPhone. If you are unable to jailbreak you iPhone yet, keep tuned in, we will post the latest details on jailbreaking your iPhone running iOS4 shortly.

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Keith Dsouza

I am the editor-in-chief and owner of Techie Buzz. I love coding and have contributed to several open source projects in the past. You can know more about me and my projects by visiting my Personal Website.I am also a social networking enthusiast and can be found active on twitter, you can follow Keith on twitter @keithdsouza. You can click on my name to visit my Google+ profile.

  • Justin

    Dude how do 3GS users like me jailbreak when it's there's only a unofficial one (I'd use that too but another problem) and it's only for Mac users (I have no friends that have a Mac). I'm a Windows user…… how???? please help me

  • Nackhat

    Is there a way to unlock iPhone 3GS with bb 5.12.04, old bootrom, and fw accidentally upgraded from 3.1.2 to 3.1.3. Please infrom. appreciated.

  • Maurice




    • Ethan

      Hi Maurice

      Could you please tell me how to unlock iphone 3G with baseband 5.12.01using windows system

    • Kd0gg

      Me too! I have a 3g with 5.12.01 working with T-Mobile!!

  • Swanny

    I've jailbroken but when I try to unlock with Ultrasn0w it's saying 'The requested modifications cannot be applied due to required dependenciesor conflicts that cannot be automatically found or fixed' – Any ideas?

  • puNk

    hey, sorry I dont fully understand. even if your still on the baseband's mention above. won't it get updated when you update to os4 ?

    i have a 3gs with 05.11.17

  • Is it possible to unlock downgraded jailbroken iPhone 3GS 3.1.2 with baseband 05.12.01?

  • Thank you very much for your hard work. Now I can really use my iphone

    • jessie

      I did same but now my iphone get "no service"

      any other issues?

  • zoheb

    Hi. i have an iphone 3g with 3.1.2 , MF – 05.11.07

    and i want to upgrade it to the IOS4, but the wifi on my phone does not work

    my iphone is already jailbroken and unlocked.

    is there any way to unlock the ios4 after jailbreaking with out ULTRASN0W??


  • Javier

    Upgraded to OS 4.0 and jailbroke with redsn0w. Did the unlock with ultrasn0w and carrier and signal will come up (Fido) but will quickly lose signal to "no signal". I've tried many methods with airplane mode and rejailbreaks but nothing seems to work. If I am lucky I can get one call in before it will eventually drop service. It is an iPhone 3G by the way. I don't know what else to do. Any help?

    • sp

      i have same problem any soultion?

      • Javier

        I havn't found anything yet but will get back here if I do. Are you using a Fido sim card also?

        • GlowGoBoy

          I am having the same problem with a US T-Mobile SIM. It connects fine, but a few minutes later, it loses bar after bar after bar until it's "No Service"

          • pravin

            bro … guess its a big issue nw .. from past 10 days i hav tried all da possible ways bt till nw no luck.. by da way mine iz 3G 16GB 05.13.04 ssh saved in cydia for 4.0-4.1 jailbroken wit REDSNOW & ULTRASNOW.>>> PLZZZZZZZZZ HELP

  • Venugopal

    I am having 3GS iphone. It is used in UK with vodafone n/w. Now it has brought up to India. When i was updating the itunes unfortunately i upgraded from 3.1.3 to 4.0 and base band changed from 05.12.01 to 05.13.04 Again i degrade my iphone to 3.1.3 by restoring itunes. Now it is in factory setings. Now the problem is the iphone is struck on the connect to itunes and emergency call screen.

    Below shows the error message throwing on my pC when i connect to itunes. Please suggest me how to get rid of this issue. Thanks in advance.

    The SIM card inserted in this iPhone does not appear to be supported.

    Only compatible SIM cards from a supported Carrier may be used to activate iPhone.

    Please insert the SIM card that came with your iPhone or visit supported Carrier’s store

    to receive a replacement SIM card.

    • Jimy

      Jailbreak it? If the sim card isn't an official carrier then that is your only option. Use redsn0w and I would update back to 4.0.

    • Raj

      Hay Venugopall, did you fix your problem ???.. I too have the same issue please lemm know how you fixed.

      Thanks in advance.

  • Yash

    how do i unlock an iPhone 3GS with iOs 4 firmware ??

    it is in emergency call mode so i cannot use any feature !! . .

    this was actually gifted to me so i m new to iPhone . . i dont know anything on OLd n NEW bootroom nor SHSH. . what should i do?? . plz help!!

    • hey did u get to unlock the phone?
      i have the same problem.
      pls email me if u do at [email protected]

    • pravin

      jailbreak it with redsnow n install ultrasnow from cydia…:) bst of luckl

  • Thank you so much, I have been unlocked my iphone 3g with this tutorial. Very clean and neat procedure to unlock :)

  • Gustavo

    works great for me with ios4 and 3gs. Thanks!. Jailbreak with sn0wbreeze.

  • Raj

    Hi guys… I have AT & T 3GS I phone and i unlocked through ultrasn0w. I jailbreak it first using jailbreakme.com then installed Cydia and ran the ultrasn0w. But i dont know whether it really unlocked my iphone or not. When i use a different sim its saying connect to itunes and the itunes says "THE SIM CARD INSERTED IN THIS IPHONE DOES NOT APPEAR TO BE SUPPORTED" …

    Please help !! 0-o

  • pravin

    Bro NO SIGNAL (ll gt it some times bt eventually drop downs)… guess its a big issue nw .. from past 10 days i hav tried all da possible ways bt till nw no luck.. by da way mine iz 3G 16GB 05.13.04 ssh saved in cydia for 4.0-4.1 jailbroken wit REDSNOW & ULTRASNOW.>>> PLZZZZZZZZZ HELP
    [email protected]
    [email protected]

    • pravin

      i hav jailbroken da same phone many times it wz wrkn like charm wit all da sims bt nw……….!!!!??? and now ultrasn0w 9.3 iz not available nw its ultrasn0w 1.1-1 iz tht da problem ..if s… hw can i gt bk ultrasn0w 9.3 on cydia …???

  • mohamed


  • Thanks
    Ultrasnow is really great to fix that issue on iphone 3G