Jailbreak your iPhone

Unlock iPhone 3GS iOS 4.1 With Ultrasn0w


As you know Apple released iOS 4.1, the latest firmware update contains baseband update and it’s un-compatible with Ultrasn0w. Fortunately iPhone 3GS with old bootrom can be jailbroken with pwnage tool. You can follow our guide to Jailbreak iPhone 3GS iOS 4.1 with Pwnage Tool (Unofficial). Following are the instructions to unlock iPhone 3GS iOS 4.1 jailbroken with pwnage tool.


Instructions to install ultrasn0w using cydia :

Step One : Press to launch Cydia Installer from your Springboard.

Step Two : Press to select the Manage tab at the bottom of the screen.

Step Three : Press to select the large Sources button

Step Four : Press the Edit button at the top right of the screen.

Step Five  : Press the Add button at the top left of the screen.

Step Six : Enter http://repo666.ultrasn0w.com as the source url and press the Add Source button.

Note:ultrasn0w is spelled with a zero, not the letter “o”.

Step Seven : Once the source has been added press the large Return to Cydia button.

Step Eight : Press the Done button at the top right of the screen.

Step Nine : Press to select http://repo666.ultrasn0w.com/ from the list of user entered sources.

Step Ten : Press to select ultrasn0w from the list of packages.

Step Eleven : Press the Install button at the top right of the screen.

Step Twelve : Press the Confirm button at the top right of the screen.

Step Thirteen : After installation completes successfully press the reboot.

Step Fourteen : Now press the Home button then power off and power on the iPhone. You do this by holding down the power button for 3 seconds then moving the power slider that appears to the right. Press the power button again to turn on the phone.

Step Fifteen : You should now be able to insert the SIM of your choice!


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Comments ( 28 )

Have Something To Say ?

  1. Ashish December 22, 2012 Reply

    I have Iphone 3GS, iOS 4.1 baseband 6.15.00, when I install ulrasn0w in the end it says ‘Could not activate Cellular data network’. How to fix this?

  2. Yuvaraj Khatri April 25, 2011 Reply

    iPhone 3GS,16GB
    i updated to 4.1 as well as upgraded bb to 6.15.00
    and now i have finally unlocked but all the networks such as ‘vodafone,Meteor,O2,3G Ireland’ are working and only ‘tesco mobile’network is not working.
    its keep saying ‘no service’ i reinstall Ultrsn0w few times and reboot the iphone BUT still not getting the luck.
    any help will appreciate

  3. solomon April 12, 2011 Reply

    i upgrade ultrasn0w but my i phone stuck on serching ,and i can`t do anything,can you help me please
    thank you

  4. Faisal Gondal January 12, 2011 Reply

    Go into Cydia packages, and remove ultrasn0w. this will bring the networks back

    Hope that helps!

  5. Helga Gabriela December 7, 2010 Reply

    After unlocking my iphone4 using ultrasn0w, I still can´t get any signal?

  6. Sandy December 6, 2010 Reply

    After unlocking it using ultrasn0w, my phone is stuck on “Searching.” When i click on Carrier it says, Unable to load network list. How do I fix this? Am using 5.14.02 baseband. Thanks

  7. Titus December 3, 2010 Reply

    mine is stuck on searching?
    i don’t know what to do after this.

  8. Franc November 28, 2010 Reply

    After unlocking it using ultrasn0w, my phone is stuck on “Searching.” When i click on Carrier it says, Unable to load network list. How do I fix this? Am using 5.14.02 baseband. Thanks

  9. ravi October 18, 2010 Reply

    Unlocking procedure doesnot work for i phone 3gs 4.1. Its just “searching”,,,

    not valid for 4.1 ios

  10. alex October 17, 2010 Reply

    I think your baseband is 5.14.02…….and this software doesnt work for that……

  11. DIL October 15, 2010 Reply


    after jailbreak using Limera1n i installed the Cydia and ultrasn0w package, after rebooting the iphone 3gs its appearing no service on signal status.

    do i have to insert AT&T sim on it?

    please advice me

    Thank you

  12. Jen October 12, 2010 Reply


    limera1n worked fine for the jailbreak of my iphone 3gs 4.1

    But after unlocking it using ultrasn0w, my phone is stuck on “Searching.” How do I fix this?


  13. John October 11, 2010 Reply

    limera1n worked fine for the jailbreak. After Ultrasn0w I am stuck on searching. Any ideas? I tried my original chip from Softbank and my Thai chip. Same results.

  14. Nel October 11, 2010 Reply

    Im Having same problem i have a 3GS FIRMWARE 4.1

  15. felix October 7, 2010 Reply

    I jailbreak iphone 3g with os 4.1 and modem firmware 5.14.02, but not catch any signal for any provider. I am using tmobile, but the phone is not recognize tmobile and not recognize at&t. Is jailbreak and have cydia, but not recognize the sim card.

  16. Luis October 4, 2010 Reply

    No updates on an unlock for 3G on 4.1 yet? Thanks!

  17. nick October 4, 2010 Reply

    I just updated my 3G to 4.1 with pwnage tool, got into cydia, added ultrasn0w. My phone performs faster, but my signal is stuck on ”searching”…when I go into settings the error message is ”unable to display networks”

  18. Babe October 2, 2010 Reply

    used the new version of redsn0w in mac and installed 4.1, then used repo666. Does not work stuck in searching mode which makes it slow and unresponsive.

  19. KinG October 1, 2010 Reply

    with ultrasn0w i manage to jailbreak my iphone 3g,but can’t unlock the phone with repo666.ultrasn0w. it’s just me or everybody. beside that i did a search on 4.1 . it says that you can’t unlock iphone on 4.1 with 5.14.2 baseband.

  20. tvaddict September 29, 2010 Reply

    can i unlock iPhone 3g with 4.1 on latest base band ?

  21. denebola September 17, 2010 Reply

    I did as it said but when I installed ultrasn0w, it doesn`t work, stuck in “searching…” and my iPhone working slowly and not responding, any ideea?

  22. pam September 13, 2010 Reply

    the same question as Zeeshan !!

  23. iphonebenson September 12, 2010 Reply

    Hey i can tell u just get information and not test. Ultrasn0w is very buggy on 4.1 so guys unless you wan your iphone 3gs to works as a slow 2g go right ahead plus it reboot .So please and don’t attempt this until ultrasn0w is updated.

  24. Mohammed Al Sarraf September 12, 2010 Reply

    Read the instruction carefully and you’ll know how to upgrade to ios 4.1 and unlock at the same time

  25. Rob G September 12, 2010 Reply

    Yes It should work for the 3G, Exceot the new pwnage tool only supports the 3GS and ipod touch

  26. fiyako September 12, 2010 Reply

    so does this work for 3g also or only 3gs

  27. netsba September 12, 2010 Reply

    ultrasn0w is not compatible with firmware 4.1 from unuficial pwnage tool, i try it and it does not working!

  28. Zeeshan September 10, 2010 Reply

    it means we can unlock iphone 3 g with cydia ? …
    i have iphone 3g with os 4.02 unlocked and jailbreak …. now i want to upgrade it to 4.1 with jailbreak and unlock …. how can i do that 😐

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