Looking to unlock your iPhone running iOS 4.1? We’ve got some good news and some bad news for you… Let’s start with the bad news, shall we?

The bad news is that if you’ve already updated your iPhone to iOS 4.1, you will not be able to unlock it, at least for the time being. MuscleNerd confirmed that UltraSn0w will not work on any iOS 4.1 baseband and that you cannot downgrade to a previous version.

And now for the good news…

The good news is that if you haven’t updated your iPhone to iOS 4.1, the Dev Team will be releasing an update to their PwnageTool jailbreak that will allow you to upgrade to iOS 4.1 while preserving your baseband, thus being able to use UltraSn0w to unlock.

In short, if you’re already on iOS 4.1, you’re screwed. If you’re on a previous firmware, you’re good as long as you use PwnageTool to jailbreak.

I’m sure the Dev Team will be working on a 4.1 unlock in the near future but I wouldn’t expect to see anything released before iOS 4.2 comes out in November. At that time, maybe (and I’m saying “maybe”) 4.2 won’t update the baseband and we’ll be able to use a potential unlock. I don’t have much hopes for that though.

  • Dadditude

    Didn’t I read that TinyUmbrella allows you to restore to 4.1 without upgrading the baseband?

  • Pissed_Off_NERD!

    Wait WHAT!??
    Will the IPhone 4 be able to Unlock or Not!??!!! I just read a blog saying “GreenPoison” will unloc the iPhone 4!

    I just bought this Sh*t last week and it came 4.1 ready so what’s the deal!???

    • Dadditude

      The iPhone 4 will be able to be jailbroken with greenpois0n on iOS 4.1 as of Sunday, but the unlock (which allows it to be used on carriers other than Apple approved carriers like AT&T) will not work with 4.1 yet, or with the baseband that comes standard with 4.1. It will most likely be updated to support the 4.0.x baseband (1.5.9) on 4.1 very soon, but only time will tell if/when the newer baseband will be unlockable. I hope that clears everything up for you.

      • gaurav

        is it possible that we preserve the baseband on iphone 4 using tiny umbrella and then jailbreak using linera1n then unlock it using ultrasnow? please reply thanks

  • Birdieman

    What does it means for people who bought the iPhones in countries where they are already unlock? I know that in USA it is still an issue.

    • It will remain unlocked ! That means factory unlocked, whatever u install it will always be unlocked however u might not be jail broken , this is what the green poison is for !

  • what about 4.0.2 baseband?

    • Best bet stay there , don’t upgrade !!!! I believe u can jb everything up to 4.1 but only unlock up to 4.01 , if I am right u r out of luck ,,,, sorry u just need wait in dev team …..golden rule never hit the update button , even if it hits u first!

      • my 4.02 fw has a baseband of 1.59.00 same as the 4.0.1 of Jasmeet… so that means after i upgrade to 4.1 CFW then I’ll be able to unlock it. woootwoot!!!

  • Jasmeet

    Hi sebas well i have iPhone 4 with 4.0.1 fw and ultrasnow unlock baseband 1.59.00 . How do I upgrade to 4.1 fw without updating my baseband so tht I keep my ultrasnow unlock and will I be able to use green p0ison jb

    • Jasmeet

      Pls reply

      • Dadditude

        See my post above. There is currently no unlock for 4.1, so you’ll have to stick with 4.0.1 until one is ready.

    • Well the poison is not for u ! Don’t update to 4.1 untill we get official news from dev team about ultrasnow unlock. In your case u just need to preserve baseband then upgrade I believe this is vert possible , but wait ! Sunday is not to far way …..

      • jasmeet

        hi just wanted to know how u upgrade my fw to 4.1 with preserving the baseband the blog says that PwnageTool jailbreak will preserve your baseband is pwnage tool jailbreak for iphone 4 and will it work on windows OS.
        thks pls reply

  • Moshi30

    Hi. Can i unlock using ultrasnow if i have iphone4 at 4.0.2 baseband 1.59.00?

    • Vijay

      Yes, you can.

      I have I phone 4 ios 4.0.2 , baseband 1.59 and I have used limera1n for jail breaking and ultrasn0w for unlocking. its working fine.

  • Charles S

    I have a question for you guys. Is it possible that we will reach a point where unlocking is no longer possible? I mean like, when Apple patches all possible security flaws, perhaps in iOS 5 or something?

    • Well let’s say it’s like ie in windows , no matter how hard they try to block all flaws , there is always a back door for an exploit !

  • MRW

    Hi Guys, I have a question too. I bought an iPhone in US and brought it to EU. It comes with 4.1 OS. So if I understand it well, steps are following – activate iPhone (don’t know how, cause i lost my original AT&T simcard), unlock (not available) and jailbreak (greenpoison on Sunday), right?

    • That is right , but it will be useless in the EU cause no at and t ? U should just bought an iPod, I hear there r really nice ones xoming out now, lol.

  • MRW

    Well I need to activate and wait for unlock.. it should works then

    • Correct my friend .

      • MRW

        I think I have old baseband, does this change anyting? thx

  • Vitaly

    Tell me anybody: if i have iphone 4 with 4.1 firmware and 1,59 baseband may I unlock it after jb greenpois0n with ultran0w?
    I updated my phone without updating the baseband =

    • jasmeet

      how have u updated to firmware 4.1 preserved ur baseband to 1.59.
      Pls reply or send a link

      • Outlaw

        he saved his SHS blobs and used Tiny Umbrella

      • c0ntr0l

        Look it up you use tiny umbrella to upgrade while preserving your baseband

      • vitaly

        Tiny umbrella
        but without SHSH =\

  • Mr. V

    What about the old iPhones 3G (not 3GS) – I remember reading somewhere that you can downgrade the baseband on them – right?

    • Burge

      Only on some 3G you need a early one .

  • Woofmoo

    Ok, just to be clear; there’s no way currently (or come Sunday) to JB and unlock my 3G (currently running 4.0 and 5.13.04) if I upgrade it to 4.1; correct? Do we think that the RedSn0w JB for 4.1 for 3G will eventually enable unlock, and that a Windows version is still coming?

  • joost

    i think so
    im scewed,
    i updated per accident my iphone 3G to 4.1 and have tried manny times to jb it ore downgrade it but with no succes. so now i have no unlock and no jailbraik, and that really sucks. and currently i also have some problems with my wifi so its actually now only an ipod 😛 but u guys think there is comming sunday a jb ore a downgrade for this ios 4.1 version?

  • Wilson

    Per the post, if you guys are reading, do not update to 4.1 it will update the baseband on the phone and you will not be able to unlock, if and when they have the unlock available. Jailbreaking a phone just allows you as a person to use the iPhone as and iTouch, for those of you telling people otherwise you are a fool working for Apple.

  • Bernard Jacobs

    Please could someone simplify the jailbreak / unlock issue for me?

    I have a recently purchased iPhone 4 with iOS 4.1 (which came installed on the phone). The phone is on Baseband 02.10.04 ………..

    I have jailbroken the phone using the LimeRa1n application … no problem ……

    My phone is still AT&T locked ………….

    1.) Is there any way that I can downgrade my phone so that it can be unlocked, even though it has only had the 4.1 iOS installed on it?
    2.) If not …… is it possible to unlock …………

    I hope someone is able to help me ???


    • Vichet

      I am not an expert, but your 02.10.04 BB cannot be unlocked right now…

    • Vichet

      The BB that can be unlocked right now is 1.59.00.

      • Bernard Jacobs

        It seems like I’m stuck here ……… do you perhaps know whether it’s possible to downgrade the phone ………… even though it came with 4.1 as the initial installation


  • KS

    People have asked this but I don’t see the reply.

    I have a brand new iPhone 4 with 4.0.2 but with 1.59.00 baseband. If the new tool won’t beat the 4.2, should we upgrade now to 4.1 and preserve the baseband with tinyumbrella?

    I don’t know enough about this stuff and need help. Above you stated that the tool will upgrade us to 4.1 and preserve the baseband automatically ,but what if 4.2 comes out before the 4.1 tool is available?

  • anyone can’t unlock his iPhone without ant baseband? is it really Dev team worked on unlocking iPhone? Then sure they can do it and get successed.

  • Sebastian Welch

    Is there a release date yet for ultrasn0w 1.0-2?
    As I am on Baseband 5.14.02?

  • Tony Cuoco

    Guys I upgraded my 4.01 to 4.1 using umbrella software but my baseband now is 02.10.04 – ICE_2_8. Does it mean I will not be able to unlock anymore?
    I saved before the 4.01 sofware via Tinyumbrella and I am able to reinstall it instead of 4.1 but the baseband stays the same unfortunately. Will I be able to unlock it if I reinstall the 4.01 or not?


  • BubbaJones

    Let’s just say Apple is a loser company in this regard. I had a US phone unlocked in the Middle East and was using it no probs until I tried to buy an App. I was totally naive to all this hacker stuff, and updated when prompted to 4.1 in blatant stupidity when I plugged it into iTunes. This is AT&T monopolizing and destroying Apple. What Apple is doing is destroying their own company – so much for “Think Different” I guess they mean “Think like an Idiot” – that should be Apple’s new ad campaign. I just bought a new iMac and software – $4,000.00 – switching from PC thinking Apple was a cool company, now I know they are just a bunch of money hungry idiots like the rest of the business world. You’d think they would have learned before hooking up with AT&T and their history of Anti-Trust litigation. I hate to say it and hope it doesn’t happen, but I see an Anti-Trust Law Suit in Apple’s near future. I’d sell your Apple stock now, unless Apple changes their attitude.

  • BubbaJones

    I guess I was more right than I realized about Anti-Trust:


  • BubbaJones

    actually, the Anti-Trust against Apple IS already happening – Apple should modify their firmware to unlock all phones ASAP…lose the relationship with AT&T – not a good company. That’s what I’d do if I was on their board, because this one is gonna be brutal:


    Let’s hope Apple does the right thing, because at this point, I’d really like to launch my brand new 21.5″ iMac off the top of my apartment building and watch it smash into 1000 pieces (but I’m not rich like the Apple execs making all this idiot decisions).

  • Sam

    Sorry if I’m repeating a question someone has already said, but to clarify- there is no way currently to downgrade and the baseband from 5.14.02 to something that can be unlocked?

  • Sam

    *downgrade the baseband

    Also, it’s on version 4.1 now. (Because I blindly upgraded w/o reading all the fact.. ugh.)

  • how long now for the iphone 4, 4.2 unlock update?