Update Baseband 06.15.00 With Redsn0w iPhone 3G / 3Gs

iPhone Dev Team released redsn0w 0.9.6 beta 5 recently with the functionality to update iPhone’s baseband with iPad baseband, making it unlockable with ultrasn0w 1.2.

To unlock your iPhone with baseband 05.14.02 or 05.15.04 we first need to upgrade them to baseband 06.15.00 from iOS 3.2.2 for iPad to be able to unlock it using ultrasn0w 1.2.

To perform the update of the baseband of iPhone on Mac OS or Windows using redsn0w, follow this tutorial.

Required Downloads:

WARNING: Do NOT update your iPhone firmware to 4.2.1 if you are currently on iOS 4.1 and follow this tutorial to upgrade iphone baseband to 06.15.00 using pwnagetool  unlock edition.

If you are currently on 4.2.1 then you’ll have a tethered jailbreak for iPhone 3GS new bootrom.

  • 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
  • iPhone 3GS new bootrom are tethered with iOS 4.2.1

Upgrade iPhone baseband to 06.15.00 using redsn0w

1. Update your iPhone iOS to 4.2.1 from iTunes if not done already

2. Launch redsn0w 0.9.6b5 ( for windows seven use compatibility mode to windows xp ) and select the ipsw firmware 4.2.1 file and wait for redsn0w to identify the firmware. (Note: windows users should right click redsn0w.exe icon and run as administrator)

3. From the next options list, select Install Cydia and Install iPad baseband options and click next. You will be warned on the next step with a notice describing the drawbacks of updating your iPhone baseband with iPad iOS 3.2.2 baseband 06.15.00.

4. Redsn0w will ask you to enter your iPhone in DFU mode by following the on screen instructions. After that keep following the instructions and your device will be jailbroken in some time.

This process will jailbreak your iPhone, making it ready to be unlocked using ultrasn0w 1.2 from cydia.

Update: (thanks to Danny)

Hi Guys just to inform you, those of you having redsnow crash on you on fetching ipad baseband heres the fix………..

1. run redsnow as per above tick only cydia NOT ipad baseband too
2. after jailbreak with cydia, run redsnow again repeat process but untick cydia (as alread done ) and tick ipad baseband copy as above.

good luck

32 comments on “Update Baseband 06.15.00 With Redsn0w iPhone 3G / 3Gs

  1. Greetings!

    I have Jailbroken Iphone 3G with modem firmware 05.15.04 and Verision 4.2.1 ( 8C148 )

    and the question is do i have only to clik on the button istall the ipad baseband without the cydia instalation?

    and will the unlocking remove all my apps from Iphone?

    Please Reply really needed, thanks!

  2. Good day! I already jailbroke my iphone 3G version 4.2.1 with baseband 5.15.04…can i just upgrade the baseband only using again the redsnow to unlock the phone? thanks

    1. Please note, upgrading the baseband is not recommended

      Now having that said, if you still want to do it, please follow the steps provided in the article.

  3. I ended up figuring it out. I read more of the comments, and then ran it in XP compatability mode because I couldn’t set the affinity, and read about compatibility somewhere else. I also only checked cydia and the ipad baseband :D

  4. it works! it took me forever however because I didn’t know it had to be done under XP compatability. you may want to throw that in there for all us common folk! :)

  5. Man you are my personal hero. I’ve spend around 10 hours google ing the stuff. But youre tutorial works just nice for me! Thanks a lot for your tutorial. Cheers

  6. Hi Nabeel, Thanks for the instructions, but I’m having a small problem as my iPhone 3g is already 4.2.1 and is currently on bb 05.15.04 your process is what I need.but when i open redsnow to browse for ipsw firmware 4.2.1 it doesn’t recognize it.so I’m snookered from step 1..and I’ve got xp so theres no need to change the compatibility..
    can you help me out on this..if you can?
    Cheers man

  7. Hey!

    Great tutorial, although when I tick the “update baseband” box in redsn0w it runs for a while and then redsn0w crashes..!

  8. Thanx Nabeel. It worked. However, I never had to do step 4 as I believe this step would have occured when I updated iOS from 3.1.2 to 4.2.1 this evening during which my Firmware version got upgraded to 05.15.04.
    Since I couldnt unlock it, I did step 1,2,3 mentioned above & my carrier sprang up.
    Since ultrasn0w was already run, I didnt have to run it to unlock.
    Thanx a ton..friend..

  9. Hi Guys just to inform you, those of you having redsnow crash on you on fetching ipad baseband heres the fix………..

    1. run redsnow as per above tick only cydia NOT ipad baseband too
    2. after jailbreak with cydia, run redsnow again repeat process but untick cydia (as alread done ) and tick ipad baseband copy as above.

    good luck

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