The Dev Team just updated RedSn0w to version 0.9.6b4, which will jailbreak iOS 4.2.1. As we explained yesterday, thanks to a combination of pwnage2 exploit, the arm7_go exploit, 24kpwn, and LimeRa1n, you will get an untethered jailbreak for iPhone 3G, older iPhone 3GS, and non-MC iPod touch 2G.

Unfortunately, other devices will get a tethered jailbreak, which means you will have to plug your iPhone in and launch RedSn0w every time you reboot…

It is very important to note that if you want to unlock, you should not use RedSn0w as it will update your baseband. Wait for PwnageTool to update safely without updating your baseband.

You can download RedSn0w 0.9.6b4 for Mac or Windows from our iPhone downloads section. We now have a RedSn0w tutorial up on the blog.

  • stevebigbirdlittlejohn

    Got this new iphone from U.S and this pirate guy told me it cant be unluck coz its 4.2 version, so what will i do? DO I THROW NOW? I MEAN MY IPHONE4?

    • CW

      Comment so full of win.

    • You could jailbreak it but the current jailbreak for your system (4g) really sucks.(you need a computer on there you download redsn0w etc.) site under construction

    • alex

      turbo sim

  • dan

    i’ll buy it from you .

  • Zabi

    is there a good way to unlock or jailbreak the iphone 4 version 4.2.1?

    • hygjdgyj


  • frank


    Iphone4 iOS 4.2.1(latest) Jailbreak is under beta testing and will be available in the next few months,hopefully soon.

    Stop asking if Jailbreak is ready. Thank you.

  • i got problem about my iphone 3g after jailbreak to iOS 4.2.1 (8C148) by Redsnow 0.9.6b4…now become no service and cannot make call and also can see the contact inside sim card…anything wrong to jailbreaking??????please help me!!!!!!!!!

    • Ivyy

      I also have a similar problem, i can’t make any calls, but i do have service and can send sms and use internet. What should I do? My call icon doesn’t appear. :/

  • cher

    ha ha thats the risk you take using hacking software on a phone, sucked in dick you lose!

  • Jc

    are there any negative effects on your iphone 4 after jailbreaking them?

  • mohamed

    fuck this

  • Romy Dhawan

    Got this new iphone from U.S but unable to get the same unlocked becoz of its 4.2.1 version.Is there any solution available for this jailbreak or DO I THROW NOW?

    • Frank

      Your a fuckinh idiot who doesnt read, burn in hell

  • sinsofasaitn

    lmfao… i got iphone and jailbreak no work, i speak no english please help, lmfao.. read mutha fuckers.. know what you’re doing before you do it.. PLEASE HELP ME, my iphone 4gbrick ohhh noo… hahahahhahaha

  • iPhone 3G 4.2 and jb with redsnow no problem. Took ten minutes and working perfect. Loving the new theme and no tethered here. It’s even easier now then it used to be. You guys having problems need to slow down and read carefully several times before attempting. If you don’t know computers you should really probably leave it alone or visit a friend who does

    • SusannaW

      Question; I’ve jailbroken a few times using different programs like blackrain and… i used the 4.2.1 Firmware and redsn0w and jailbroke my Iphone 3g. It works fine, has service, everything works but the Phone icon does not appear.. i have it set so if i press the home button twice it will come up but cant find the icon… anything u can suggest?

  • josh

    i got iphone4 with 4.2.1 in it how can i unlock it and jailbreak plz tell me

  • Joseph

    If anyone has any comments on breaking the iPhone 4 (4.2.1), please give me a call. I’d love to chat with anyone about this. Thanks, my name is Joseph and my # is 541-301-7787. I hope to hear from someone soon.

  • Dude7285

    Isn’t jail breaking now legal? Search that.

  • Isn’t jailbreaking now legal? Search that. . Note the website is under construction.

  • nino b

    i have the iphone4 the couldnt jailbreaking now i dont know wat to do it. and how soon it will be jailbreak. man i hope its soon cause i cant wait 4 real…

    • I have I phone4 4.2.1 and don’t know what to do still how to unlock it let me know thanks.

  • bala

    does tis jailbreak of ios 4.2.1 supports any sim card

  • bob

    ya this jailbreak supports any sim card but the way to unlock is when you download redsnow from youtube you have to change the iphone baseband to an ipad baseband which is available on the redsn0w application

  • king taiba

    hey cant u just purt a download button so its easier for every one u so dum do a jailbreak for 4.2.1 later idiot!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  • sunny

    i have a carrier unlocked iphone 4 version 4.2.1 bought it from singapore and it works well in india…can i jailbreak it ….i have downloaded redsnOw 0.9.6 version of it to my pc it safe to jailbreak it …..

  • Leo

    There is a problem whit the file of redsnow 0.9.6 b4, the file is downloading with an error and its imposible unziping….

  • shakil

    i two days before buy iphone 3gs version 4.2.1 two times it become blank i have to go market for restart he is saying update is not available yet today also same thing happen on there is apple sign on the screen please let me know what to do thanks

  • xoro leo!

    shaaaaaaaaaaa el meo programa hermanito!!! la volaita .__.

  • what a bunch of dumb cunts, read the comments/instructions ffs! its not rocket science..

  • Katie

    does anyone know where i can get firmware for an iphone 2g on 4.2 and if it can be jailbroken by redsnow?

  • maraval oran

    if you want to break it like you said is with a hammer but if you want to ((((( jailbreak it is with the latest greenpoison

  • ????k

    l o l lo lol ol lol ol olo lo lo lo lo lo lololololoololololololol

  • raj

    i dont really know what to do

  • i want to unlock my iphone 4 4.2.1

  • CodeName Hacker

    Use Greenpois0n to jailbreak 4.2.1 it is really easy i jailbroke my iPod and iPhone 4 using it, it was really easy

    • CodeName Hacker

      it is RC6

  • HabibSaulKostasVala

    how to for jalebrakeded ifoan i bricked phone no englishh i’m too fuking stupid to do this!!

    LISTEN TO ME!! Take your iphone outside and throw it as far as you can. Leave it there. You dont need it. You cant even take the time to learn English well enough to communicate, there is no fuking way you are going to figure any of this out.

    “sorry my english bad” …. FUK YOU!! LEARN PROPER ENGLISH OR DONT POST!

  • Wayne

    Does Red snow let you change you IMEI Number

  • asasd

    fuck u all

  • govinda

    dear sir when do we get 4.2.1 version unluk software.

  • Got a iPod toach what2 do

  • Neviim

    I got a 4.2.6 iPhone from Verizon I want to know how to jailbreak

  • Neviim

    I got a 4.2.6 iPhone from Verizon I want to know how to jailbreak it

  • john mc poo


  • Joseph

    I have an iPhone 4 (4.2.1) and A friend of mine from computer programming engineering at my university helped get my iPhone jailbroke. My iPhone is now working great! If anyone has any questions about how I got this to work, I’ll be glad to tell you what I did to my iPhone. My cell # is 541-301-7787 & my name is Joseph.

    • Yousef

      I dont know how to download redsnow or greenpoyzun and Instollus,cedyi ? i have a iphon4 4.2.1

  • Joseph

    I have an iPhone 4 (4.2.1) and A friend of mine from computer programming engineering at my university helped get my iPhone jailbroke. My iPhone is now working great! If anyone has any questions about how I got this to work, I’ll be glad to tell you what I did to my iPhone.

    • please can you help me? I have been having trouble. I have an IPhone 3 (4.2.1) and i can’t find anything to jailbreak it with. Please help?

    • hey i would love to know more. my iphone 4 was stolen and all i have is this old one that i want to jailbreak and unlock.
      any advice would be much appreciated!

  • Cb v.

  • jesse Dziedzic

    You could not be more factual!

  • how do you download it what do you click