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Downgrade iPad Baseband 06.15.00 to 05.13.04 is Very Much Possible!

Author: Ben Johnson on April 9, 2011

WARNING: DO NOT install the iPad baseband on the 3GS. The newer 3GS (week 36 & above of the year 2011 (Serial No:xx136xxxxx)) will DEFINITELY brick your device during 06.15 baseband flash. It has been confirmed to permanently damage the built-in radio hardware, thus rendering it useless pretty much forever. It doesn't matter whether you integrate it into a custom IPSW or use Redsn0w. As of now the only solution is to return to Apple store & get it replaced. The iPad BB unlock solution had its piece of happy times & now its over. So think twice. The older iP3GS's (week 35 & below) are safe. A more detailed discussion about this can be found at JailbreakQA.

MuscleNerd, who happens to be one of the core members of Dev-Team just confirmed that downgrade of iPad baseband 06.15.00 to 05.13.04 is very much possible and is 99% doable. Downgrading iPad baseband back to 05.13.04 will not only fix battery drainage issues but will also help iPhone 3GS/3G users to fix their broken GPS.

iPad Baseband Downgrade Possible

@Kamiela2010 the downgrade potential from 06.15 remains (in my mind) 99% doable, but other things always seem to preempt working on it

In reply to:

@MuscleNerd it seems you guys have no interest in fixing gps issues with 6.15.00. Am I right??

Back in November 2010, Dev-Team released Ultrasn0w 1.2 to unlock iPhone 3GS (Baseband: 04.26.98, 05.11.07, 05.12.01, 05.13.04, 06.15.00) and iPhone 4 (Baseband: 01.59.00) on iOS 4.1 & iOS 4.2.1. Those who were running 05.14.02 or 05.15.04 baseband on their iPhone 3GS/3G were given with an option to upgrade their baseband to iPad baseband 06.15.00 if they want to use Ultrasn0w 1.2 to unlock their iPhone. Upgrading to iPad baseband not only made some iPhone 3GS users to lose their GPS but they also faced severe battery drainage issues.

Upgrading your iPhone 3GS to iOS 4.3 upgrades its baseband to 05.16.01 and restoring stock iOS 4.3.1 upgrades its baseband to 05.16.02. As both of these basebands are < than iPad baseband, so practically it is possible to upgrade them to 06.15.00. Now if you are thinking about upgrading your iPhone 4 (02.10.04, 03.10.01 or 04.10.01) baseband to iPad baseband then don't be too smart because iPhone 3GS/3G basebands do not require SHSH blobs to flash iPad baseband but the iPhone 4 does :P

According to MuscleNerd, instead of working on the unlock of individual baseband (05.14, 05.15 or 05.16), he will devise a single downgrade method for all iPhone 3GS users running iPad baseband. In this way, those iPhone 3GS/3G users who have baseband 05.14.xx, 05.15.xx or 05.16.xx will be able to use Ultrasn0w 1.2 by first upgrading to iPad baseband and then downgrading back to the unlockable baseband 05.13.04.

Conclusion: If you are waiting for the unlock of iPhone 3GS 05.14, 05.15 or 05.16 baseband then forget about it. In either way you MUST first upgrade to iPad baseband and then downgrade back to baseband 05.13.04. The best method to upgrade your iPhone 3GS to iPad baseband is by using Sn0wbreeze 2.5.1. Just download Sn0wbreeze 2.5.1 from here and follow this guide to upgrade your baseband to iPad baseband. If you are on Mac, use Redsn0w 0.9.6b5 instead of using Sn0wbreeze.

Update#1: Fix iPhone 3GS (iPad Baseband) Battery Life Issues on iOS 4.3.3 [Tips]



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  • Paul

    Hello, i was using newest redsnow to jailbroke iphone 3gs 8gb (05.16.05) and didnt know that i cant unlock it with this baseband, then i Anyway installed ultrasniw unlock (i know its stupid, it didnt workd) then i decided to chande baseband to 6.15.00 ipads, i used same Redsn0w 0.9.10.b1 for changing baseband, after everything was done it asked for itunes activation offcourse i tryed to turn on with itunes and i was getting error then device is not supported or something ( i dont remember sorry) and i decided to jailbroke again ( maybe it would atleast work with my old sim lol) after that wifi is gone, cant even turn it on and fone dont show any baseband and turns off automaticly in2-3mins, please help me to fix this mess, thank you very much

    • http://jaxov.com/ Patrick

      Hello,

      Hardware failure. Baseband IC is damaged. Confirmed. There is no way you can recover your iPhone. Even after restoring, 99% of users were out of luck. It is very rare issue. If it is in warranty, go for it. Otherwise, buy a new iPhone.

  • Kem M.

    Hi, i have an IPhone 3GS with IOS 4.1 and bb 06.15.00, jailbroken and unblocked. It was working fine like for 3 months, but suddenly, about 2 months ago, it started to show problems when trying to connect on 3G. When I try to get 3G connection, it always goes to No Service while on 2G (GSM / EDGE) works completly fine without any problems as usual.

    I'm wondering if any of you guys have seen this issue before, and if you know what could be causing it and how to fix it.

    Please I'll appreciate any suggestion
    Thanx

  • javyfalcon

    i have an iphone 3gs on 5.0.1 with baseband 05.16.05, no one has been able to help me unlock it and use it in Spain. I have installed cydia on it several times with even the newest redsn0w 09 10 b1. I have looked everywhere, can you help? I just want to unlock my phone, I'm even considering paying one of those sketchy website that somehow have miraculous ways to unlock it. help!

    • http://jaxov.com/ Patrick

      Unfortunately, it seems that your baseband is not supported right now. Your choice now is to install the iPad baseband since that one is supported.

  • MarcosVP

    Hi, any update about the iPad BB downgrade? Because I have done it to my iPhone 3G and I really wanto to use my GPS hahahah, and I have now a iPhone 3GS (BB 05.16.05), and I've looked for a JB and the only way it's upgrade the BB to iPad's BB and then unlock...

    Thankful.

    • http://jaxov.com/ Patrick

      I don't think there's a method for you to downgrade your BB, the only way for you to unlock is just like you said is to upgrade your BB and unlock since it is supported.

  • Greg1001

    Is it possible to downgrade ipad baseband? Cause I want to factory unlock my 3GS (old bootrom), but I need to have "proper" baseband for 3gs (e.g. 05.16.05 for IOS5).

    Thanks for answers - it will help me a lot!!

    • http://jaxov.com/ Jacklord

      @Greg1001 Hi,

      I don't think it is possible to downgrade a baseband as of now..

  • wsiddiqui777

    hello i was wondering if there is a way to update my iphone 3gs to ios 5. it is currently on ios 4.3.3 with the ipad baseband installed. i also do not need the ipad baseband unlock anymore because im with the right carrier now. so if there is a way to update to ios 5 and get rid of the ipad baseband please do share.

    • http://jaxov.com/ Jacklord

      @wsiddiqui777 Hi,

      You can only upgrade your iPhone 3GS to iOS 5 if you have SHSH blobs saved. And yes you can upgrade to iOS 5 using custom IPSW which you can create using Redsn0w 0.9.9b8 but this functionality is only available to Mac OS X users. You can upgrade to iOS 5.0.1 w/o SHSH blobs.

      Hope that helps!

  • Jean

    I have an iphone running on 4.3.3 and baseband 04.11.08 can i downgrade only the baseband? I need unlock the phone using gevey sim card.
    I already read about that i need downgrade by itunes and after that i need use redsnow to create a custom IPSW to upgrade only the version and keep the same baseband. I hope someone you guys can help me. Thanks

    • http://twitter.com/pram0dm Pramod

      Once updated, you can never downgrade your BB unlike the iOS. There is no unlock for your device at the moment.

    • phoen rich

      use miracle sim it's work 100%

  • randomquestion

    so you say that a 2-year-old 3gs cannot be bricked upon being upgraded to 6.15?
    currently, i have:
    4.3.3, 05.16.02
    how can i jb&unlock it safely?

    • http://twitter.com/pram0dm Pramod

      Yep, that's precisely what I'm trying to convey here. You can follow the default steps mentioned here http://bit.ly/lccwoE to JB & unlock your device. The usual risks & consequences involved with updating your BB to the iPad's BB still apply though. So make sure that your totally aware of them before your proceed.

  • McLaren

    Thanks pramod :) for the reply... It's sad though coz I cannot use my iphone 'til the downgrade release from dev-team... I'm quite confident that dev-team will release BB downgrade in time...

    Here in Philippines, also apple idevice technicians having a problem with this issue. They have their own 3GS and they're using it as paper weight LOL... And in my hand now a quite expensive music player...

    Thanks againg m8 :)

    • http://twitter.com/pram0dm Pramod

      Well, even a tool like that will not help resolve your BB chip issue. Only a h/w fix can solve it because your BB chip is now practically useless / damaged.

  • McLaren

    Thanks Pramod... If ever dev-team released a downgrade of BB from 6.15 to 5.13.04, is this going to save my iphone 3GS? I hope :(

    • http://twitter.com/pram0dm Pramod

      If ever - At the moment, that itself is a big question mark. :(

  • McLaren

    Got the worst nightmare... My iPhone 3GS is f**ked up, I think. No wifi, no bluetooth, no IMEI nor ccid and it keps on restarting every 4 to 5 mins.

    Can't sleep and can't help thinkin that i may not be able to use my iphone for the rest of my life. I know this has something to do with my iOS downgrade to 4.1.. Originally 4.3.5. My iphone is week 38 of 2011.

    Iphone bought in US via AT&T by my sister then ship here in the Philippines.
    I'm Thinkin one of the 2 parts are failing...
    1. Battery
    2. Worst... Basband chip.

    If it's baseband chip, it can be replaced, right? Battery is the simplest part to replace.
    By the way, baseband from 5.16.02 upgraded to iPad BB 6.15.00

    I hope a baseband cHip replacement will have my iphone back to its normal state…

    Need advise….thanks :)

    • http://twitter.com/pram0dm Pramod

      Unfortunately, only a replacement of your device from an Apple Store can fix your problem. There's nothing else that can be done about this as your iP3GS is now bricked for life & I'm not sure if a BB chip replacement would help either. :(

  • Travis

    With "dead" I mean it turned itself off (battery was more than 80%) with a little flash on the screen and now I can't turn it back on. Nothing works, like there's no battery. Totally dead. Is there anything I can do? When I had a Windows 6.1 phone I used to hard reset the device from time to time. The device was working (except the GPS issue) flawlessy...(what Apple care would do if I'd send a jailbroken device to them?)

    Thanks again!

    EDIT: Hi Pramod,
    I have successfully restarted my iphone by holding down the home+on/off button. Rookie mistake! (sorry this is my first iphone). Anyway my iphone was built in the 37th week of 2010 but it didn’t give me problems regarding the ipad bb (except the gps issue): why?

    • http://twitter.com/pram0dm Pramod

      Yep, I have made the post more clear about that. Devices belonging to the year 2011 with week 36 & above are the ones affected by the radio loss issue. Yours belong to the year 2010, so you have no issues at all. :D

  • John

    Hi Pramod. Yes I can personally vouch for it on several iPhones from my own testing. Others will confirm this.

  • Travis

    Hi Javox,
    I need help!
    I have a jailbroken 3gs on IOS 4.1 and ipad baseband. It worked fine for about 5 months but now the device seems dead. Nothing seems to work. What should I do to get it back to work? Cydia had saved both 4.1 and 4.3.5 shsh blobs.
    by the way I just found out my device serial number reads xx037xxxxxx : this is what your warning is referring to, right? I bought the device in Asia but not at an Apple Store (in fact it’s an AT&T device), I still have the receipt though…
    Thank you!!!

    Travis

    • http://twitter.com/pram0dm Pramod

      By stating that your device dead, does it mean that your radio is killed & that you now have no Wi-Fi / BT / GSM signals on your device? Do you have valid IMEI/BT/Wi-Fi addresses?

  • John

    Not true. I can personally guaranteeredsn0w itself is not at fault.( snowbreeze, and redsnow) all use same baseband flash files and same tool (same as stock fw) and parameters- (it is actually covered in the link I sent you on the last page and confirmed) however whether or not you choose to believe that is up you, doesn't change the situation

    Last post on this subject- Just thought it was worth tipping off

    Regards

    • http://twitter.com/pram0dm Pramod

      Using the same files still doesn't necessarily mean that its actually the same way they are applied onto the device right? One applies it whilst a restore & the other doesn't. All I'm asking you (for my personal checks only though I have already updated the posts with warnings) is whether a custom Sn0wB IPSW results in the BB loss or not. Can you personally vouch for it? Because this guy apparently can. Also that last question doesn't answer it quite right. Once again, its not the matter of whom / what to believe, I double check my advices before I pass it on. :)

  • John

    Both methods (sn0wbreeze/redsn0w) actually flash the baseband in exactly the same way. Here is more information

    http://jailbreakqa.com/questions/65072/after-3gs-baseband-update-615-phone-now-is-blank-imei-wifi-bluetooth

    • http://twitter.com/pram0dm Pramod

      I get that & I have scoured through the post as well with much detail, but it never really said anyone lost / crashed it due to Sn0wbreeze. There is no such reference because such a thing points to the fact that Redsn0w might be the one at fault here.

  • John

    Jaxov Site admin- be warned newer 3gs(week 35 from testing so far) currently will CERTAINLY brick during 06.15 baseband flash, no matter whether you intgrate into IPSW or use redsn0w. As of know the only 'solution' is to return to Apple store You can search jailbreakqa, where user named ipHoneguy initially posted the info, gsm forum or email me- I can tell you what (little) I know about this subject so far

    Although this isn't a new development and the answer hasn't been found I think it would be tremendously helpful to post a warning regarding this as your blog has a fair amount of traffic from people interested in flashing and this could potentially stop them before bricking

    • http://twitter.com/pram0dm Pramod

      Yep, I have come across that post, but it all states the use of Redsn0w & not the integration of the iPad BB onto custom IPSWs. How did you confirm that?

  • xoutxgunnedx

    I'm alittle confused does the iPad baseband flash work on the iPhone 4 or does it not an if so what are the risks,

    • http://twitter.com/pram0dm Pramod

      Nope, this kind of unlock is only for the iP3G/3GS.

  • momo

    Hi, i have a 3gs with the ipad baseband on 4.3.3 and i was just wondering if i do not need the unlock on my 3gs anymore, would it be safe for me to upgrade my iphone with itunes to the factory ipsw? Im aware this will update the baseband but will it be harmful for my device. If it is i will wait foe the baseband downgrader to be released. Thnks in advance.

    • http://twitter.com/pram0dm Pramod

      Yes, you need to because if you by any chance update to the latest iOS, your BB gets updated as well & becomes unstable & unusable. You will need to always depend on an unlock no matter what if you are already on an iPad BB. You can always use a custom IPSW to update your iOS once a proper JB is out.

  • Sam Mutawe

    Sure, forgot to mention that as well, we need not to forget the risks if we decided to do the ipad upgrade.

  • Sam Mutawe

    Hi Guys, i believe any one with locked baseband should upgrade to Ipad baseband for one reason, that the Dev Team will not release unlock solutions for those basebands, instead the dev team will release a downgrade solution for the ipad baseband. So if this happens then anyone with locked baseband then has to upgrade their basebands to Ipad 6.15 then use the downgrade solution to get back to an unlockable baseband.

    • http://twitter.com/pram0dm Pramod

      You also need to keep all the risks involved in doing so as well. :(

  • roboduke

    hi, nice article, i just bought a used iphone 3gs and now its running on 4.1 with the baseband 5.15. what you say it to not waste my time waiting for the hackers to unlock that baseband. should i or should i not, i really want to use that phone now, i dont have 3g internet so i wont be using the gps anyways and im not planning to sell my iphone anytime soon. maybe i should just upgrade the baseband to 6.15 and unlock it so i can use the phone. now its just and overpriced ipod touch to me. thank you

    • http://twitter.com/pram0dm Pramod

      To update / not is your call to make. Just make sure you think twice before you do so & make yourselves aware of the consequences following the same.

  • Nicholas

    Dude u are the only that can save me.
    i did the ipad baseband upgrade but my iphone got stuck in a apple's logo loop. so i put my iphone in DFU and used tiny umbrella's Fix recovery. And now the screen is black !!! Dont know if the iphone is off or trying to turn it on. i opened itunes and discovery that the iphone was still in DFU mode so i restart it. Now is stuck with that fckng apple’s logo.

    What can i do ???
    plz help me !!!

    Thx in adv

    • http://twitter.com/pram0dm Pramod

      Did you by any chance recheck the Install Cydia option though you were already jailbroken prior to updating your BB via Redsn0w? Also, did you try using Redsn0w's Fix Recovery option as well?

  • dennis

    Hi,
    has this been actualized

    • http://twitter.com/pram0dm Pramod

      Nope. Don't expect it anytime soon either.

  • Andrew M

    What do you recommend me to jailbreak with and when I do jailbreak can I use an official firmware to do so or which firmware would I use

    • http://twitter.com/pram0dm Pramod

      Use Redsn0w to JB your device. Redsn0w is always pointed to the stock iOS just like how Sn0wbreeze works.

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