Jailbreak your iPhone

Downgrade iPhone 3G Baseband 5.08.01(OS 3.1 B) to 4.26.08


Good news for the peoples who accidentally upgraded their iPhone 3G to OS 3.1 beta. iPhone OS 3.1 Beta updates your current baseband to 5.08.01which is unlockable at the moment because Ultrasn0w is not supported by the latest baseband. Bigboss released Fyzzyband 3.1b1-1. Fuzzyband Downgrader is a safer iPhone 3G  Baseband Downgrader as this one detects your baseband and bootloader version and does the wright thing first. More general 3GFuzzyband Downgrader detects your bootloader and baseband and downgrade it with a simple click. Fuzzyband Downgrader available in ICY and Cydia just refresh your sources and search n install the application.

latest version of Fuzzyband Downgrader has two features Upgrades / Downgrades baseband to 4.26.08 for unlocking with the ultrasn0w tool released by the iPhone Dev-Team. If you are on a lower baseband than 4.26.08 Upgrading will put the 4.26.08 baseband from 3.0 on the modem so that ultrasn0w may be installed from Cydia. Downgrading works from any version greater than 4.26.08 (currently 5.08.01 is the newest version available, found in 3.1 beta 1). It will put your baseband back at version 4.26.08 which is the current unlockable version by Ultrasn0w.

Downgrading only works on phones that have the 05.08 (5.8) Bootloader from the factory. This is a very limited number of phones that were released in the first few weeks of the 3G production cycle. If you do not know your bootloader then you can run Fuzzyband and it will report the version number for you. In my case i have bootloader 5.09 but my baseband is 4.26.08 and i m very concerned about baseband updates. So after the OS 3.1 final release I’ll wait for the Dev team release.

Fuzzyband Downgrader Downgrade iPhone 3G baseband


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Comments ( 28 )

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  1. 123123123123 December 18, 2009 Reply

    LOL, THANKS, oh my god, it saved my life, oh, man, now my iphone 3g is working the wi-fi, thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanks

  2. amrinder October 28, 2009 Reply

    i was update my iphone 3g with the help of itunes and after that it got locked
    the update was iPhone2,1_3.1.2_7D11_Restorewhat will i do to make my iphone again unlocked
    please help

  3. dontknow October 28, 2009 Reply

    IPhone 3G – 16GB – Black
    Firmware Version: 3.1.2
    Baseband Version: 05.11.07
    Bootloader Version: 06.02

    Any solutions to unlock, downgrade or something ????????????

  4. i-Alex October 27, 2009 Reply

    i have iphone 3G version 2.2.1 before using fuzzy band.. after i installed fuzzyband and accidentally upgraded the the base band to 4.26.08 and asked me to up grade my version to 3.0 to be able use ultrasnow..and my bootloader is accidentally changed to 6.04,, now my spec is Bootloader 6.04 with Baseband upgraded to 4.26.08 and ultrasnow isntalled..
    its work for any GSM card but not for UMTS..

  5. Arshad October 24, 2009 Reply

    Im also waiting for the dev team for an unlock for bootloader 6.02 Plz do something in this regard as its been so long.

  6. Prasad October 21, 2009 Reply

    I am also waiting for the DEV team to come up with an unlock for the bootloader version 6.02 as my iphone 3g is pretty much just a ipod touch for quite sometime now. Please please come up with the same.

  7. MANAN October 18, 2009 Reply

    hey i have iphone 3g
    baseband 5.11.07
    bootloader 6.02
    what am i suppose to do in order for me to use it unlocked. Help PLZZZZZ

  8. amere October 13, 2009 Reply

    please dev team the whole world is depending on u all for the 06.02 downgrader u never let us down b4 and i no u will not this time thanks.

  9. chris October 13, 2009 Reply

    Hey Guys,

    got the same problem, my iphone was stuck , so i reloaded the software via itunes…
    Now it jailbreaked with 3.1 , baseband 5.11.07 and bootloader 6.02 !

    My question is: Can we use a additional sim (Gevey Sim, Turbo Sim, Rebel Sim) for unlock. In that case its worth just paying 10 Bucks/Euro’s for such a simcard… Then just wait till a new version of ultrasnow comes out!

    Is there anybody who tested the gevey sim?


  10. spawnjack October 9, 2009 Reply


  11. jumbo October 8, 2009 Reply

    I have a iphone 3g with 3.0 OS,when i try to upload a music to itunes,
    accedentally i upgrade my iphone to 3.1.Now my Iphone is LOCK,and is working even i insert a simcard,cannot recognise any simcard i inserted.Please tell what im going to do?and hiw to unlock my iphone?
    It is possible to unlock again?



  12. Christy October 7, 2009 Reply

    Thats amazing! How the heck did u manage to do that? Have 5.09 bootloader and still have 04/26/08 BB?! >< im like just waiting for anything to get my iphone 3g unlocked. I have 3.0 or 3.1 bootloader [i found a way to hange them] 5.09 bootloader and 05/11/07 BB.

  13. Raj October 5, 2009 Reply

    I have also got the same problem , upgraded Iphone 3G to 3.1 OS. I am able to downgrade to 3.0 and jailbreak. Unlock doesnt work as it has bootloader 6.04 and baseband 5.11.07. Waiting for some a solution.

    Appretiate whoever working on it.

  14. Andre October 3, 2009 Reply

    Guys, are we screwed? Is there a chance that my 6.02 bootloader iphone might be nothing more that an ipod due to this freaking update? I bouhgt this on ebay on monday, i enjoyed for a 2 or 3 days….never knew that i should never do an update on itunes… damn…

  15. Jawad October 3, 2009 Reply

    ive also got my iphone 3g 3.1 locked with baseband 5.11.07 and boot loader 6.02.. fuzzy band cant help..
    is there any way we can get outa it? i mean either downgradin or unlocking at 3.1?

  16. Shashank October 2, 2009 Reply

    I waiting to tool to downgrade baseband(5.11.04) to bootloader 6.04 for my iPhone 3G os 3.1…when release that?????
    Please tell me…

  17. Andre October 1, 2009 Reply

    For god sake, we need a tool to downgrade devices with bootloaders of 6.02! Any updtaes on this?? Tks a lot

  18. gaksu October 1, 2009 Reply

    Same here too,

    I have upgraded to 3.1 and it’s locked. I downgraded to 3.0 but baseband is still stucked at 5.11.07. Fuzzyband does not work due to my 6.4 baseband ootloader. Now phone is just became an ipod with apps. Any suggestions?

  19. bhavin gandhi September 29, 2009 Reply

    I waiting to tool to downgrade baseband(5.11.04) to bootloader 6.02 for my iPhone 3G 3.1…when release that?????
    Please tell me…

    same problem

  20. Hamed September 29, 2009 Reply

    and me too Angel, i waiting to tools to downgrade BB (5.11.07) via Bootloader 6.02, My Iphone is 3g os 3.1


  21. Inluke September 29, 2009 Reply

    Hi i tried to jail break my iphone 3g, it had 3.1 from the store. i got the Pwnage tool to wrok but it dont change my band to lower. its stil on 05.11.07 =( so i cant unlock it.
    Anyone knows when its going to be posible?

  22. Angel September 22, 2009 Reply

    I waiting to tool to downgrade baseband(5.11.04) to bootloader 6.02 for my iPhone 3G 3.1…when release that?????
    Please tell me…

  23. Adam Bradley August 17, 2009 Reply

    @shobhit just do a restore in itunes and jailbreak it again.

  24. shobhit August 13, 2009 Reply

    i have boot loader 5.09 and baseband 05.11.04 running on 3.0.1 fw.

    I dont want to unlock it but it has been jailbroken. I am getting no service issue, any suggestions as to how i can use my iphone with my original sim with the above?

    Its freaking *** that now my iphone is just a stupid itouch without the actual network signals.

    Pls help thanx.

    • Vinay August 13, 2009 Reply

      @ Shobhit Dude you just messed with your baseband and thats really bad for you. There is no tool at the moment to downgrade your Baseband on Bootloader 5.9 Now wait for 3.1 release and Dev team release. My prediction is they will release updated version of RedSn0w to jailbreak only and for unlocking they’ll release a updated version of Pwnage tool (Custom Firmware). Now pray from god that Dev team find any loophole in latest baseband otherwise your phone is no more than a iPod..

  25. Jon August 7, 2009 Reply

    I found out that this also helps when trying to downgrade to 3.0 and you get no signal because of the updated baseband. thanks for the help!!!

  26. ala'a July 26, 2009 Reply

    is it safe??
    anyone tried it??
    does it work on iPhone 2G?3G??

  27. Amber July 15, 2009 Reply

    Has anyone had success with downgrading the 3.0 with a Bootloader 5.09 & Baseband of 4.26.08?

    Also, when is the OS 3.1 supposed to be released?


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