Good news for everyone who resisted upgrading to iOS 4.0 due to unavailability of unlocking tools. Ultrasn0w 0.93 has been released to unlock all iPhones on the latest 05.13.04 (on iOS 4) and 05.12.08 (on 3.1.3) basebands.


At this point of time, when we are waiting for a proper jailbreaking tool to jailbreak iOS 4.0 on all iPhones and iPod Touches, the iPhone dev team has released UltraSn0w 0.9.3 which is the first iOS 4.0 unlock tool. This tool can work with basebands 05.13.04 and 05.12.08, meaning those users who upgraded iOS 4.0 preserving baseband can also unlock iOS 4.0 with Ultrasn0w 0.93.

Check out our step-by-step guide to unlock iPhone 3Gs and iPhone 3G on iOS 4.0 using ultrasn0w.

How to Unlock iOS 4.0 Baseband 05.13.04 on iPhone 3G/3GS?

1. Jailbreak iOS 4.0 on iPhone using RedSn0w (coming soon)

2. Once jailbroken, start Cydia and go to Manage section

3. Now click on sources and click on edit to add following repository

4. Now search for Ultrasn0w 0.93 and click on install

5. Let Ultrasn0w 0.93 complete unlocking procedure. Once your iPhone will reboot you can enjoy your unlocked iPhone 3G/3GS 4.0 with your favorite carrier.



Raju is the founder-editor of Technology Personalized. A proud geek and an Internet freak, who is also a social networking enthusiast. You can follow him on Facebook and on Twitter. Mail Raju PP. Follow rajupp


  • Jonecir

    So where can I download the Ultrasn0w 0.93?

    • Raju

      Please read the post completely, it helps to understand jailbreaking/unlocking better. As for your question,

  • Jonecir

    Hi Raju,

    I read the post again and again. From step 2 I went to, which says:

    “It is very important to note before proceeding that it will work with iPhone 3GS only if it has the older bootrom (non-MC model). iPhone 3GS users who have upgraded to the stock 3.1.3 are still out of luck.

    And my iPhone has the lastest bootroom. Should I still try it?

    • Raju

      If you are on iPhone 3GS, please wait for Snowbreeze 1.6 release which will be released soon. If you are on iPhone 3G, you can jailbreak using redsn0w 0.9.5 beta 5, but I wont recommend that since it is still in beta

  • Bala

    Hello Raju,

    Thank you very much for your update.. Finally after 4 months of hard waiting, today I unlocked my Iphone 3G 05.12.01 firmware and 05.09 bootroom with the new ultrasnow.

    Thank you once again and all the best for your continued efforts.

  • Pash

    Just unlocked my iPhone 3GS with the 05.12.01 baseband, 3.1.3 OS! Finally!!!

  • Dean

    So where do we download Ultrasnow 0.93 ? Where do we download the jailbreak ? Where can we get instructions how to do all of this if your iPhone 3G is stuck on the ‘Emergency Calls Only’ screen ?
    I see a lot of web pages about the new jailbreak and unlock but no download tools or simple instructions ??????? Very confusing ??????????

  • Hari

    I had updated my phone to IOS 4 and screen is locked allowing only emergrncy calls. When will be jailbreak for iphone 3gs realeased for baseband 05.13.04?

  • Mars

    i have updated iphone 3g to 4.0
    now my screen stays on emergency calls? it came with AT&T carrier
    since i live in india i dont have AT&T sim to activate it.
    is it possible to restore it to back to 3.1.3, since i made a mistake as iTunes suggested me to upgrade to new software.
    how can i restore it back since itunes detects the phone but says please insert the sim card to activate the iphone.

    please help me to restore it back? how can i get restore option in itunes.

  • David Hayter

    Hi there,

    Just wondering…I’ve jailbroken and unlocked my iOS4.0 3G. If I restore to a non-jailbroken iOS4.0 through iTunes, will I lose the unlock? Or is the unlock a permanent thing? I hope there is a way to permanently unlock…


  • Ramesh

    hello, how can i unlocked i phone 3gs ver.4.0 can anyone help me plz!

  • kiran

    hello, how can i unlocked i phone 3gs ver.4.0 can anyone help me plz!

  • Zabear



    PASS IT ON!!!!!

  • vivek

    hello, how can i unlocked i phone 3gs ver.4.0 can anyone help me plz!

  • Credit-Repairman

    There is no unlock available yet for 3GS running 4.0 3.1.3

  • kwai

    pls help me….my iphone 3gs struck at the apple there after i restore to make it back?

  • stephen

    I’m on O2 UK. I’m thinking of doing permenent unlocked with O2.

    1. If I do a restore/update(after the permenent unlocked with O2), I won’t need the original O2 sim card anymore to activate the iphone, correct?


  • Ron

    hi, i have 2g iphone with iso 4.1, how do i unlock my phone. please help me.


    power it off by holding power button and home button until it offs and then hold the home button and when “connect to itunes” comes up, rerestore it.