Sn0wbreeze 3.1.3 for Windows brings jailbreak for iPhone 2G, 3G and iPhone 3GS (older bootroms only) which can preserve your older baseband while upgrading you to the latest iPhone OS 3.1.3 firmware. This effectively means that once yu jailbreak using Sn0wbreeze, you can also unlock your iPhone 3G and 3GS using the latest version of ultrasn0w (for 04.26.08 baseband) or blacksn0w (for 05.11.07 baseband) as they both are compatible to work with the respective older baseband versions.


iPhone 3G and 3GS users can follow the step-by-step guide posted below for unlocking using ultrasn0w. iPhone 2G users need to follow the guide posted here

1. Follow the step-by-step guide posted here to jailbreak iPhone 3GS or iPhone 3G on iPhone OS 3.1.3 firmware. Guide for iPhone 2G with redsn0w can be found here.

2. Once your iPhone is jailbroken, start “Cydia” on your iPhone and touch on “Manage” tab on the bottom. Now touch on “Sources” as seen in the screenshot below:
Note: T-Mobile users should disable 3G before installing ultrasn0w.


3. Edit and Add ““. Cydia will now automatically update your sources by following a series of automated steps.

4. Search for “ultrasn0w” in Cydia and install this application. The latest version 0.92 of this app will automatically unlock your iPhone so that you can use it with any carrier with proper carrier name/logo.


5. Now simply restart your iPhone.

You should now have a fully unlocked iPhone 3G/3GS on firmware 3.1.3!


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


  • RJ

    Is it safe to jailbreak my iphone 3g that is locked and has a baseband 05.12.01?

  • HS

    No, there isn’t :(

  • E.M. Stadum

    Raju, It is not clear to me from your post whether Ultrasnow will unlock a once unlocked 3G iPhone on which I installed 3.1.3 which had the effect of nullifying the unlock. In effect, I now have a locked 3.1.3 3G phone. Will Ultrasnow or anything else currently available unlock it?

    • Raju

      it will work only on jailbroken iPhone, moreover doesn’t work on 05.12.01 or 05.11.07 baseband versions

  • Neo

    How do I know if an Iphone is Jailbroken or Not???

  • Neo

    How do I know f my version of Iphone is jailbroken already I have version 3G 05.12.01 baseband

  • Rajshekar Reddy

    Dude please help me..
    I have jailbreak my iphone 3gsp(5.11.07) with Blackra1n but Unexpectedly I delete Blackra1n application from iphone, now how it unlock the iphone and how to install cydia, I tried restoring, etc etc..please help me…

  • Noble

    I need help on how to Unlock my Iphone 3GS to work in all country..Its stop working after i upgrade to the software version 3.1.3

  • Manoj

    Hi, I’m having iphone 3gs which has benn upgraded to 3.1.3 with the firmware 5.12.01. Does this snowbreeze can unlock my phone. please do reply….! i’ve been waiting since 2 months

  • hacked

    just done mine was updated on 3.1.3 band 5.12.01 not now 04.26.08 baseband

    super mint fab

    was about to pay 02 15 pound to unlock it lol if you not donw it all ready get it done

    rem to Sn0wbreeze :)

    keep up the good work and thanks

  • azii

    my iphone goes on cable mode when ever i turn off then i have to jailbreak i wana remove cable mode so iphone turn without connecting itunes
    iphone 3gs with 3.1.2
    firmware 5.11.07

  • kevin

    will the ultrasn0w work on iphone 3g 3.1.3fw with 6.15.00 baseband?