How To: Downgrade iPhone 3G/3GS Baseband From 06.15.00 To 05.13.04 With RedSn0w 0.9.14b1 [Windows]

Have you been stuck on the special iPad 06.15.00 baseband on your iPhone 3G or iPhone 3GS with no GPS functionality? Would you like to downgrade your iPhone 3G or iPhone 3GS from the 06.15.00 baseband to a regular iPhone baseband like 05.13.04? If so, then you are in luck because MuscleNerd has released an updated version of RedSn0w that supports downgrading your iPhone from the 06.15.00 baseband to the 05.13.04 baseband. This will finally fix the GPS issues caused by the special iPad baseband, and will allow iPhone 3G/iPhone 3GS users to restore to stock IPSW’s. As such, in this how to guide you will learn how to downgrade your iPhone 3G or iPhone 3GS from the 06.15.00 baseband to the 05.13.04 baseband with the Windows version of RedSn0w 0.9.14b1.

Note: For a Mac OS X version of this how to guide please click here.

Downgrade 06.15.00 Baseband To 05.13.04

Step 1: Download RedSn0w 0.9.14b1 for the Windows operating system using the download mirror below or through the iJailbreak Downloads Section.

Download RedSn0w 0.9.14b1 (Windows)

Step 2: Once you have downloaded RedSn0w 0.9.14b1 you will need to launch it by first extracting RedSn0w, then right clicking on the RedSn0w.exe and clicking the Run as administrator option (if applicable).

RedSn0w 0.9.14b1 Baseband Downgrade Windows

Step 3: With RedSn0w 0.9.14b1 up and running you will need to click the Extras button. You will now see a few buttons presented to you. The button you are interested in is the Select IPSW button. Click this now and select your whatever firmware your iPhone is currently running.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsNote: You can find out what firmware your iPhone is running by launching the, going into the General tab, followed by the About tab and looking at the Version label.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsRedSn0w 0.9.14b1 Baseband Downgrade Windows

Step 4: Upon selecting the iOS firmware click the back button, and then shutdown (“slide to power off”) your iPhone. Once you iPhone has shutdown you can proceed to  clicking the Jailbreak button.

RedSn0w 0.9.14b1 Baseband Downgrade Windows

Step 5: After clicking the Jailbreak button RedSn0w 0.9.14b1 will begin processing in step 3.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsWhen the firmware has been processed you will come to a screen with a few options for your Jailbreak. Obviously you will want to ensure the Downgrade from iPad baseband is selected, and also keep in mind that if you are already Jailbroken you will want to deselect the Install Cydia option.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsOnce all your options have been selected you will need to click the Next button and you will come to a screen where you will need to put your iPhone into DFU mode. Read through and follow the instructions presented to you which is to plug in and power off your iPhone and click the next button.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsStep 6: When you click the next button you will need to follow the instructions presented to you to put your iPhone into DFU mode.

  • Hold down Power (corner) button for 5 seconds.
  • Without releasing the Power button, also hold down the Home (bottom center) button along with the Power button for 10 seconds.
  • Without releasing the home button, stop holding down the power button for up to 15 seconds.

RedSn0w 0.9.14b1 Baseband Downgrade WindowsRedSn0w 0.9.14b1 Baseband Downgrade WindowsRedSn0w 0.9.14b1 Baseband Downgrade WindowsStep 7: After you successfully enter DFU mode RedSn0w 0.9.14b1 will begin the baseband downgrading process. DO NOT interrupt or use the computer during this time. It is important to keep in mind that when your iPhone gets to the “Flashing Baseband” step it will sit there for up to 10 minutes with no feedback. Again DO NOT interrupt or disconnect your iPhone, especially during this step. When the iPhone is finished being downgraded it will reboot into a functional and jailbroken state. Congrats!

The baseband of your iPhone 3G or iPhone 3GS has just been downgraded from 06.15.00 to 05.13.04. The next step to unlocking your iPhone on the 05.13.04 is simply installing the latest version of UltraSn0w from Cydia. For more tutorials visit the How To Jailbreak Section. Leave any questions or further thoughts in the comments section below.

Note: If you are encountering crashes or ‘no signal’ after installing UltraSn0w click here to follow a how to guide to fix this problem for good.

Don't forget to follow on Facebook, Twitter and Google+.
  • T3chn0

    it works!

  • guest

    Took several tries to reinstall mobile sustrate (perhaps the result of a busy server), but once that and ultra sn0w were reinstalled it worked like a charm. Many thanks!!

  • Kush Melik

    not working keeps saying perform a clean slide to power off then retry. I know I’ve powered it off right, why won’t it work

  • It13l

    after the baseband downgrade my iphone´s battery just gets low too fast even with 3G and localization services off and SAM wildcard activated message appearing. any solution???

  • It13l

    after the baseband downgrade my iphone´s battery just gets low too fast even with 3G and localization services off and SAM wildcard activated message appearing. any solution???

  • Tayo Adewale

    will it work on this serial 859456XU3XX?

  • Tayo Adewale

    will it work on this serial 859456XU3XX?


    after going into DFU mode i get “ipad baseband failed.”
    I have a JB iphone 3gs, old bootrom on iOS 5.1.1 with
    iPad 06.15.00 baseband.Your thoughts?

  • Abeeche12

    i got 3gs jailbroken on 5.1.1 and with 6.15 and redsn0w says thas is all ready jailbroken and i can’t downgrade the baseband

  • Scoot_eruk

    Doesnt work, says flashing baseband but the activity bar does not move forward, then phone re-boots and BB is still 6.15 :(

  • bong

    after baseband downgrade i 
    rocky racoon 5.1.1 ultrasn0w fixer for 5.1.1and ultrasn0w. its a success! maraming pong salamat!

  • Jack

    is this work on 6.15.00 or i can downgrade from 5.14.0 on my 3gs?

  • Abeeche12

    Seems like my 3GS GPS isn’t working after the downgrade

  • Vicky_0687

    successful in downgrading the ipad baseband……

  • Stangfreak1984

    the only problem that i am having is after the prosscess is that. none of my tweaks work from cydia. the only one that will is unltrasn0w thats pretty much about it

  • Stangfreak1984

    only for 6.15.00, upgrade to 6.15.00 then do the downgrade. i tryed it on my 3g and it worked for me. DO THIS AT YOUR OWN RISK. I ACCPET NO RESPOIBLITY FOR ANYTHING THAT MAY HAPPEN TO YOUR DEVICE BY DOING THIS

  • Josephs

    no service after downgrading… carrier not available..

  • Johnny_boy006

    i tried to downgrade my 3gs , but after the process is complete , i still have de 6.15.00 baseband …. can somebody help me ? thx

  • Zanstothman

    same here

  • Imakebots

     the same problem

  • Whoami

    Serial Number: 87013XXXXXX, 5.0.1, 06.15.00 not working. fresh restored to 5.1.1 not working, ultrasn0w installed but not working.

  • Tinh Lac

    same here! i dont event unlock it again :(

  • Niks_hideout27

    same happened with me guys…just reinstall baseband 6.15 again through redsnow…..

  • Stephen Yongseo Kwon Jr.

    hi, my iphone still has iOS5.1, should i update it to 5.1.1 before i do this baseband downgrade?

  • Imtiaz

     I have same problem

  • Bunthorn_tho

    My 3gs No Service after downgrade ..

  • Loppp

    Great work,it worked on my 3g, still can not get my notifications to work though as there is no push certificates available on push doctor :-(

  • fasat2112

    worked perfect on iPhone 3G from first time….tnx

  • beamme2

    reflash 06.15

  • Loneranger2012

    I tried many times on 2 of my 3GS, serial # 88929xxxxxx & 84941xxxxxx: still 6.15.00.
    I searched on internet, very few got bb downgraded but many did not. Unfortunately, the ones got it did not post the SN for others’ references.

  • Grandmastersaxay

    it worked for me on 4.2.1

  • Richandgil

    Easy as – thank you so much. 

  • Ok-u-win

    apperently muselnerd is realesing a new download on thursday fixed

  • Xyz

    Worked like a charm!  Didn’t even have to reinstall UltraSn0w

  • Andy

    My 3G 4.2.1 after downgrade. Same baseband not work try many time and battery bar not work after charger 2 hours need help .

  • Bluerangeredman

    What Niks said. Just reinstall the 06.11 baseband. My new bootrom 3GS was giving me “searching” and “no service” and after reinstalling the mobile substrate and Ultrasn0w like 10 times it still wasn’t working so reinstall the 06.11 and you’re back in business.

  • Bluerangeredman

     Sorry. baseband 06.15. I dunno where I got 06.11 stuck in my head from!

  • MAN B&W

    Same problem with me. After downgrading  base band 6:15 to 5.13 i cannot open all my application its takes 1 hr to open after rebooting. and still could not activate cellular data network. i tried many times install and uninstall the ultra snow..fuck…i just restore it to its original default settings through sync. to itunes. and just JB it again to 6:15 baseband….fucking iphone…

  • Joe2333343

    Worked great! Thank you,

  • chakshu jain

    thanx work on iphone 3gs

  • Sabir Gill


    Remove Mobile substrate.
    Remove ultra snow.
    Any other ultrasnow fixer 5.1.X

    Then reinstall mobile substrate.
    Reinstall unltrasnow.

    Restart and it should work.

    It wasnt working for me without removing Mobile Substrate.

  • Sabir Gill

     Yup go to 5.1.1 with baseband preservation method if youre in 06.15.
    If not then go to 5.1.1 and then put ipad BB.

    Then downgrade.

  • xman

    on ios 4.1, base band 6.15.00
    Tried above steps..but still in same baseband:-(

  • bestphoneiphone

    “redsn0w.exe has encountered a problem and needs to close. we are sorry for the incovenience.” i have tried so many times but this error will comes every time… help plz

  • Aftabstarmagician

    i have succesfully completed n i m now  on 05.13.04 i use a vodafone sim carrd whatever my  beaeband be vodafone simcard always works so now can  i restore with apples stock ipsw

  • LoveiPhone

    Are u using iPhone 3G or 3Gs? After the downgrade do you mean that i can unlock with apple iTune and dont need to use Ultrasnow?

  • Chikku

    it works successfully downgraded BB from  6.15.00 to  05.03.04 :)

  • sam

     me too ..downgrading worked as a charm i have now 05.13.04…..but my gps seems not working

  • iPhoneLover

    After downgrading iPhone 3Gs its not starting, Apple boot logo appers on the screen and it remains as it is. How can that be solved?

  • Vincent

    My GPS still doesn’t work. The downgrade was successful though, I’m on 5.0.1 with BB 5.13.04 unlocked with ultrasn0w. Can anyone help?

  • Kasun1010

    I tried and successfully  downgraded  from 06.15.00 and unlocked my iphone 3gs. but now I only have signal only if I enable 3g. When I disable it. No Service. Help

  • KMK

    dude im on 4.2.1 too nd my baseband now is 05.13.04 but still no gps. are you getting signal on google maps

  • KMK

    hey thats what happened for me too.. still no GPS :( :( :( dude did you fix it?? 

  • Jerysmiles

    just downgraded my iphone 3gs old bootrom  running in ios 5.1.1from 6.15.00 to 5.13.04 and i didnt have to use utltrasnow to unlock. it just unlocked fine.

    thanx for the good work.

  • Monsieurdenver

    i successfully downgrade from ipad baseband to 05.13.04 but i still dont have GPS signal on my iphone 3G…can you help me.? thank you very much.

  • Abdou_num

    it works, if you got “no serrvice” problem, just reinstall ultrasn0w and restaure network parametres.

  • Monsieurdenver

    i downgrade from ipad baseband with success.i have service connection “t-mobile” everithing is fine with that,but i don’t have GPS SINGAL…..wierd ! can somebody help me about this ?

  • johngki

    works like a charm…….tenks…..

  • Mohsin Khan

    wooooo , thanks i have 06.15.00 BB i will unable to unlock but when downgraded it works :)

  • Arsh

    Thank you. I followed the instructions and my baseband reverted to 5.13.04 from 6.15.00 on my 3GS… my GSP started working without doing anything else.
    This is a great! Thank you again.

  • Vincent Ko

    i still cant us my gps in find my iphone

  • simbad

    Thanks for the tuto, is this fix still working?

  • Alex


  • Copycat

    Just showing: panic: we are hanging here! please help me!

  • Varun

    Worked like a charm indeed!! Thanks guys!

  • Deepak2012

    i had prob with iphone 3gs after jb and unlock and upgrading to ios 5.1.1 BB 6.15.00…says No signal/Searching….i launched redsnow->Extras->select ipsw->back to jailbreak->select downgrade from ipad baseband->DFU mode—–> Voila! Its a wonder!!! Didnt even have to reinstall ultrasnow after that…Thanx to all those guys who shared their experiences n helped me succeed!

  • Mitch

    After seeing other warnings about the serial number of your 3GS, would one starting 880145 work with this?

  • Alex

    me too. Iphone 3GS, new boot ROM. downgraded successfully to 5.13.4 but GPS still doesn’t receive satellites. p.s. my Wifi signal is also very weak.

    solution anyone?

  • les

    pang 3gs ba to?

  • Marin Junior

    hi there, the thing is that I used itunes and update my phone to the newest ios version ios6. now I can not activate the phone because I dont have the sim card to do that. Can not use phone neither as an ipod. please help…. how to downgrade not only the baseband but the ios to 5.1.1? thanks

  • Bob

    i had and iphone 3g and i put it in ipad baseband and then i accidentally clicked restore all setting i tried everything but nothing works can someone please please Help me. THNX

  • Hamxa Xahid Awan

    same here dude!! i’m really stressed!! and my 3gs is also not picking my sim up!! can’t activate my OLD LOVELY IPHONE !!!

  • Abheesh S

    It worked fine for me… GPS is working too…

  • Baby Giant

    Once I got out of WTF mode (dont ask) it worked perfectly! Even saved all of my old settings, numbers, apps, etc. FINALLY get to use my maps!

  • Baby Giant

    iPhone 3g 4.2.1



  • villambenei

    i heard, that if i’ve already got a 06.15 baseband, and have no signal (or searching..), i can’t downgrade from 06.15, am I right? i’v accidentally updated to iOS 6.0.1, but my phone was jailbroken, it doesn’t see any SIM cards…

  • Abi

    First of all, Thanks a lot for this great tool. Used the redsnow give on description. I have 2 3GS with base band 6.15.00, one with 4.1 and another 5.0.1. Both are downgraded to 5.13 with out any issue( May have to restore the official firmware). I have done initially with 4.1 IPSW. The description is great. I haven’t tried with GPS functionality. Rest of all working good.
    Thanks Again

  • Vipin Dhingra

    just followed and worked great.

    PS. I had jailbroked 3gs new boot room initally running IOS 5.1.1 base band 6.15.00.After these steps I am back to 05.13.04. and none of my data was deleted which is awesome.

    thanks guys :)

  • Pingback: Desimlocker son IPhone 3GS | ZenM@il.Biz()

  • Fatijon

    Its safe to downgrade iphone 3gs 16gb ios 5.0.1 baseband 6.15.00 week 22 year 2011 to


  • [nemo]

    can i do this with ios6.1.3? iphone 3gs??

  • [nemo]

    can i do this with ios6.1.3? iphone 3gs??

  • saqi

    i hav ios 5.1.1 nd ipad baseband 06.15 nd i want to downgrade from ipad baseband……… i do it in redsnow it says “ipad baseband failed”….nd i have no service error as well/…

  • luccifferr

    my phone is unactivated and due same i cannot jailbreak using this p0six

  • Issa W Ghanma

    i have downgrade the baseband to 15.13.04 but still the gps doesnt work