Full iOS 4.2.1 jailbreak summary

iPhone 2G (iPod touch 1G)

1. You can use a custom Whited00r firmware, which adds all the new features of iOS 4.2.1 to a 3.1.3 firmware

More info

iPhone 3G (iPod touch 2G)

1. You can use a custom Whited00r firmware, which adds all the new features of iOS 4.2.1 to a 3.1.3 firmware, you also have a LITE version that will work very smoothly.

More info

2. You can create a custom firmware that does not upload the baseband with snowbreeze from Windows

Last version

Tutorial

3. You can create a custom firmware that does not upload the baseband with Pwnage Tool from Mac

Tutorial

4. You can download a Custom firmware directly from here.

.

iPhone 3GS (iPod touch 3G)

1. You can use greenpois0n if you don't need release.

Last version

Windows Tutorial

Mac Tutorial

2. You can create a custom firmware that does not upload the baseband with snowbreeze from Windows

Last version

Tutorial

3. You can create a custom firmware that does not upload the baseband with Pwnage Tool from Mac

Tutorial

4. You can download a Custom firmware directly from here.

.

iPhone 4 (iPodtouch 4G)

1. You can use greenpois0n if you don't need release.

Last version

Windows Tutorial

Mac Tutorial

2. You can create a custom firmware that does not upload the baseband with snowbreeze from Windows

Last version

Tutorial

3. You can create a custom firmware that does not upload the baseband with Pwnage Tool from Mac

Tutorial

4. You can upgrade to official firmware 4.2.1 preventing baseband from uploading (then you can jailbreak with Greenpoison)

Tutorial


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  1.   dake said

    Hello!
    I have an iPhone 3Gs that yesterday I did the Jalibrake with ultrasn0w 1.2, it goes very well, without problems. Now yes, it is from Movistar and I would like to release it to use it with another company 🙂,
    the baseband is 05.15.04, it was released before, but they had to change it to AppleCare and they gave me a new one with this baseband, could it be released?

  2.   Onio said

    Dake, on this page they tell you if you can do the jail and release depending on the models, firmwares and basebands of each iphone. In your case, I think it is releasable, but see for yourself:

    http://jailbreak-me.info/

  3.   alberto said

    Thank you Gnzl for your time, you are very great!

  4.   albeksdurf said

    The iPod Touch 2G is also supported by Greenp0ison. You have not put it !!

  5.   dake said

    Thanks, I'll see you later at home ... One thing, now it puts me on the 3G that is "looking" for the network and does not connect to Movistar, what could have happened? Has the sim been fried or what can it be?

  6.   nembol said

    It is very good to know it easily and quickly, but you forgot the iPad ..

  7.   gnzl said

    We did not forget the iPad:
    .
    http://www.actualidadiphone.com

  8.   Abdel said

    Very good post, great summary !!! gnzl

  9.   galanot said

    Excellent work!
    What I am not so clear about is that it is worth updating to 4.2.1 from my iphone 4 with 4.1, which works great ... am I missing something important with this version?

    regards!

  10.   gnzl said

    Above all find my iphone

  11.   dake said

    Onio thanks for the link, I see that there is more to lose than to gain, by uploading the baseband as it comes in the link that you give me, I lose the iPhone warranty and I don't like that very much, since I have the apple care for three years…. I am going to see if in a while it is easier to free the phone…. The issue is that I left Movistar and paid the penalty, they should release me but there is no way, they have me!
    Thank you all!!

  12.   Alberto said

    @Dake the iPhone is released to finish the stay, if you have gotten away before ending it even though pages do not release it. So they have told me.

  13.   galanot said

    @Gnzl: but that forces to have the GPS always active, right? if so, it is a constant battery drain difficult to justify, don't you think?

    regards

  14.   gnzl said

    The iPhone 4 turns off the GPS and turns it on automatically when you need it, so there is no more wasting battery, when find my iPhone asks for location it will turn on the GPS.

  15.   galanot said

    Man, that changes things a lot. Thanks for the clarification. Even so, I think I'll wait for the next version ... mostly out of laziness ... you know, if something works, don't touch it xD

  16.   crispo said

    Hello, I have a problem, I have updated to 4.2.1 from 4.1 more than anything to find my iphone but I realize that when trying to activate the face time it stays in waiting for activation and does not activate it and before with 4.1 if I could have any suggestions that is not the most logical.

  17.   Kong said

    Hi, I have an iPhone 4 (AT&T) that I bought with firmware 4.1 and baseband 2.10.04. As far as I understand I can't release it 🙁
    Can I put the 4,2 without modifying the firmware and be able to release it in the future when ultrasn0w comes out for 2.10.04 ??? Do I need the SHSH ??? I hope someone can help me 🙂
    Thanks for the page and the summary 😉

  18.   Alberto said

    I am on version 4.1, but if I install the ipad baseband 06.15.00, would I run out of gps? I say it to be able to release it: S or better I wait?

  19.   Cracker23 said

    Is there any method and in case of affirmative how? to jailbreak and release an iphone 3gs ios 4.2.1 with the modem of that version and make it unthetered.
    I went to use redsnow the latest version and I think it does thetered and gren…. the latter does not modify baseband to the ipad dl. do you know something?
    or do I have any failures?
    help please !!!
    and very good post !!!

  20.   Nacho Casas said

    As always, Excellent all your work gonza !!! regards

  21.   Cristian said

    Very good summary, what if, in the 3GS issue it includes the new bootrom (MC) or just the old one?

  22.   Ferrari said

    Hello I have the iphone 4, version 4.2.1, download the greenpoison program, for windows, I follow the instructions and in principle the mobile does everything perfect ... but the loader icon does not appear.
    What am I doing wrong?
    Greetings.

  23.   river said

    Hi, I have done the jalibreak with the custom firmware, but I don't get the option of operators, I'm with simyo and I don't get coverage. What I can do?

  24.   ipod touch said

    and me with my ipod touch with 3.1 what a disgrace