Jailbreak your iPhone

Upgrade iPhone 3G, 3GS Baseband 06.15.00 with PwnageTool Unlock Edition


Earlier today we told you that Dev Team releases Ultrasn0w 1.2 Unlock for iOS 4.2.1 it turned out that in order to unlock iOS 4.2.1 you need to update your baseband with iPad baseband. if you are stuck on Baseband 05.14.02 or 05.15.04 you can update your baseband to 06.15.00 with pwnage tool or redsn0w and enjoy the Ultrasn0w unlock.

Following is a step by step guide to update your baseband to 06.15.00 with pwnage tool. Pwnage tool is available for Mac OS only, if you are looking for a Windows solution then check our Guide to Update Baseband 06.15.00 With Redsn0w

Tethered vs Untethered

  • iPhone 3G are untethered up to iOS 4.2.1
  • iPhone 3GS old with bootrom are untethered up to iOS 4.2.1
  • iPhone 3GS new bootrom are untethered up to iOS 4.1


Instructions :

Step One. download all required files and move it to your Desktop.

Step Two. Launch PwnageTool and accepted the initial message by clicking OK. Now select on iPhone 3G / 3GS option and hit the blue arrow.111

Step Three. Pwnage tool Seek the IPSW Firmware 4.2.1 / 4.1 on your iPhone 3G / 3GS, you have saved to your Desktop.

Step Four. A  new pop-up will ask if you want to update the baseband or not.

  • If your current baseband is version 05.14 or 05.15 you must click YES
  • If you are not interested in updating your baseband then click NO.

Step Five. Now pwnage tool will search your desktop for iOS 3.2.2 firmware for iPad.

Step Six. Now pwnage tool will ask you if  you are with an official carrier or unofficial carrier.

  1. If you are using an Official service provider (i.e. AT&T) you do not need to "Unlock Baseband", therefore you can click on YES
  2. If You are using an Unofficial service provider (i.e. T-Mobile) then check “Activate the phone” So you can enjoy Ultrasn0w, Click on NO

Step Seven). You will be asked to save your custom .ipsw file. Save it to your Pwnage folder you created on your Desktop.

  • Your IPSW is not being built. Please allow up to 10 minutes.
  • You will be asked to enter your administrator password. Do this then click the OK button.

Step Eight). Once your ipsw has been built, Pwnage Tool will guide your through the steps to putting your iPhone into DFU mode.

Step Nine). Once your iPhone is successfully in DFU mode, Pwnage Tool will prompt you to launch iTunes.
Step Ten). To select custom firmware, hold the Alt/Option key and click Restore.
Step Eleven). Navigate to your desktop using the dialog window that appears. Select the custom IPSW that was created and click the Choose button.
Step Twelve). iTunes will now restore the firmware on your iPhone. This can also take up to 10 minutes. Once done you will be rebooted into jailbroken iOS 4.1 / 4.2.1 with baseband 06.15.00


Note : This procedure is tested by me and many iPhone users but we are not responsible for any damage. Do this at your own risk, and if you have any problem, question feel free to ask us on twitter also you can subscribe our free daily e-mail newsletter to keep yourself updated with the latest of iPhone community.



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Comments ( 26 )

Have Something To Say ?

  1. nelcreation May 5, 2011 Reply

    i have a iphone 3gs n i updated it to 4.3.2 (05.16.02) whats the tutorial on upgrading it to baseband 06.15.00
    thanks in advance

  2. iphone 4 March 22, 2011 Reply

    but dont work gps with baseband 06.15.00 how to fix this prb ?

  3. Grev February 11, 2011 Reply

    Just want to confirm will this work with

    3GS NEWBOOTROM 4.2.1 (jailbroken – UNteathered with Greenpois0n)



  4. Audrey January 9, 2011 Reply

    I had the same results it was sayin error 1015 ..I went to see on itunes and still dont understand .

    My IPHONE was jailbroken and I unlocked it myself but I had this battery problems so I tried to fix it but I didnt …I just fucked up and now there is this message ”error 1015” everytime I try to restore.

    I’ve been tryin all week dont know what to do anymore 🙁

    anybody can help !?

    Thank u

  5. ja January 8, 2011 Reply

    i have the exact same problem as Baldo .. any news?

  6. Chris January 6, 2011 Reply


    This device isn’t eligible for the requested build

    Hey Vinay how about addressing this issue…

    Also why when the file “iPhone2,1_4.2.1_8C148a_Restore.ipsw”
    is downloaded from your own link does pwnage say it cannot find the firmware?

  7. Baldo December 5, 2010 Reply

    i tried this method and got to point when im restoring custom IPSW with itunes. Getting error 1015 and getting stuck on recovery mode.. What can i do on this?

  8. Sam Davidson December 4, 2010 Reply

    Currently i have valid AT&T service however moving overseas so paying term fee on 3gs Version4.2.1(IC148a) with broadband 5.15.04. As i update via PWNAGE when it asks if i have “authorized through itunes” do i say yes or no? Next 30 days in the states but moving first of january to China. I’ve tried few times and it worked once (i think) however when verifying with “apple” it rejected the package i had built through PWNAGE. Suggestions?

  9. curious December 4, 2010 Reply

    Hey I got through the whole process until the final step and it says this iphone could not be restore. This device isn’t eligible for the requested build. any ideas?

  10. HanZhenSheng December 4, 2010 Reply

    Hi, I have a locked iphone 3GS with 4.1 intalled.
    Followed the whole procedure to create a custom firmware on 4.1.
    When restoring to this customfirmware itunes notifies: this device isn’t eligible for the requested build.
    On the other hand, if i try to create a custom firmware on 4.2.1, pwnagetool does not want to accept this ipsw.
    I do not care if i have 4.1. or 4.2.1, I just want my iphone unlocked.

  11. pavan December 3, 2010 Reply

    i had upgraded to ios 4.2.1 with baseband 6.15 and then downgraded to 4.0..
    now when i am trying to upgrade to 4.2.1 it wont happen.
    can anybody help me out with this please coz none of the ios or jailbreak or anything is working

  12. bryan December 3, 2010 Reply

    mine did not work when i followed the whole procedure when i did the reboot it just freeze what can i do???

  13. Jay December 2, 2010 Reply

    Hello, I recently purchased a 3g Iphone, and it came with 3.1.3 FW and 6.15.00 Baseband. I cannot unlock it, id does have cydia but it wont even let me install ultrasnow. In the middle of the install process, the iphone freezes and shuts down, then when I try to reboot, it is stuck in the apple logo.

    What can I do?


  14. Quynh December 1, 2010 Reply

    I have 4.1 3GS new bootrom and followed the directions, however, I get the error “Device is not eligible for requested build”??? Looks like Apple is making everyone upgrade to 4.2.1?? However, the tool will not let me use the 4.2.1 bundle….please help

  15. Grant December 1, 2010 Reply

    I have an Iphone 3gs and when i followed all of the steps in itunes it said this iphone is not “compatible”. What does this mean? how can i fix it because i use t-mobile and i need an unlock. i havent used this as a regular Phone in two months. everything worked fine until itunes popped up. When i tried doing 4.2.1 on Pwnage tool it didnt accept it and now i am without a jailbreak and unlock. If you have answers reply to this message

  16. hudub December 1, 2010 Reply

    Asad, I had the same problem. Everything seemed like it was working until the reboot and then I checked my baseband and it did not upgrade. Remained at 5.14.02 =(

  17. Asad November 30, 2010 Reply

    Like you said 4.2.1 , when i browse 4.2.1 pwnage tool rejects it saying wrong firmware bundle. but it does take 4.1 firmware. I would say the directions are not clear on this page. I used the 4.1 bundle and i am still unable to upgrade my baseband. I was able to create custom firmware based on 4.1 and 3.2.2 ipad but that restore did not upgrade my baseband.

  18. Ali November 30, 2010 Reply

    Hey there!
    I did this method to my Iphone 3G and it worked successfully! However, I also tried this same procedure with my Iphone 3GS 4.1 5.14.02, and it didn’t work..Cydia however did appear, But the ultrasn0w source addition didnt work, and the baseband also remained the same at 5.14.02, I did download the Ipad stuff and it worked successfully with my Iphone 3G..

    any tips?

    My software is 4.1, 5.14.02
    I upgraded to 4.2.1, 5.14.02..and still same results..

  19. Moi November 30, 2010 Reply

    Hi Vinay,

    i am with a 3GS 4.1 Baseband 5.14 newbootroom.My question is:Can i just upgrade the Baseband to 6.15.00 with Redsnow without updating the firmware to 4.2.1 in ordre to unlock with Ultraswon.Or should absolutley update my firmware to 4.2.1 via Itune before using Redswon.I sorry i’ve been searching for an answer and have not been succesfull.

    Thank you very much for your reply

  20. Brandon L November 30, 2010 Reply

    Unlocking phones is silly. Go Android!

  21. John November 29, 2010 Reply

    can i use ios 4.0 instead of 4.1 or 4.2.1 !?!?!?

  22. marvin November 29, 2010 Reply


    do i need to update my iphone directly to itunes or pwnage tool??but its only update of baseband
    im confuse….

  23. Bob November 29, 2010 Reply

    On Step Seven:
    You will be asked to enter your administrator password. Do this then click the OK button.

    For what the password is required? The tool must read and write IPSWs – and for this the tool has all rights. It smells.

  24. CJJM November 29, 2010 Reply

    Super Tutorial.. Works a treat !!!! THANKS !!!

  25. zoma November 29, 2010 Reply

    thanks for instructions
    this instruction is for windows or mac?
    thanks again

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