Apple released iOS 4.2 (or iOS 4.2.1) for iPhone, iPad and iPod Touch earlier today.
iPhone Dev team has provided a quick update for users who want to jailbreak and/or unlock their iPhone.
Before they go on to explain the current situation, they have advised users to avoid updating to iOS 4.2.1 until they release tools for iOS 4.2.1.
iPhone Dev team has provided the following details for users who want to jailbreak their iPhone, iPad and iPod Touch:
The best news of all is for owners of iPhone3G, older iPhone3GS, and non-MC iPod touch 2G. Due to a combination of our original pwnage2 exploit, the arm7_go exploit, 24kpwn, and limera1n, your device is “just as jailbreakable as ever.” You reap the full benefit of an untethered 4.2.1 jailbreak.
Next are the owners of all the more recent devices. The good news there is that due to geohot’s limera1n exploit, all recent devices can be jailbroken (this will be true until Apple released new hardware that fixes geohot’s limerain exploit in the bootrom). The bad news is that right now, the 4.2.1 jailbreak is *tethered* on all of these recent devices. A tethered jailbreak means that each time your device loses battery power or needs to be rebooted, you must attach it to a PC or Mac to boot into the jailbroken state. @comex is working hard on a method that may untether the 4.2.1 jailbreak, but it will require you to have your 4.1 SHSH blobs in order to use it. No word on how much more effort it will take though (please don’t bug @comex about it!). (We also have an alternative method that may work, but @comex’s method is much more elegant.)
iPhone Dev team hope to release tools to jailbreak iOS 4.2.1 later today:
Well if you’re a JB developer or tinkerer, you’ve already probably used the redsn0w mentioned in our last post to jailbreak 4.2.1 and at least get SSH working. But beyond that, there are still some last minute issues with MobileSubstrate and comex’s kernel patches that are being fixed. We’ll tweet and post a blog update when it’s all available (we hate to give ETAs, but barring any unforeseen problems, probably later today).
iPhone Dev Team has provided the following details on their blog for users who want to unlock their iPhone:
As always, ultrasn0w unlockers please stay far far away from this official firmware (and all official firmware). Wait for the ability to create custom 4.2.1. IPSWs that don’t update your baseband!
Dev team has also provided an update for users who are eagerly waiting for Ultrasn0w for iOS 4.1 and now will be looking forward to one for iOS 4.2.1:
After redsn0w is officially released with the new Cydia and kernel patches, we’ll be able to assess the unlock situation. It’s already looking very promising though, so expect the unlock for the 3G and 3GS to be coming this week. The i4 unlock is taking more effort though, and no further concrete info is available about that yet.
Dev team has also adviced users to take a backup of SHSH Blobs (ECID) using Firmware Umbrella. Please note that if you have already jailbroken your iPhone, iPod Touch then Cydia would have taken the backup automatically.
As always, we’ll let you know as soon as we’ve any further updates. So stay tuned here at iPhone Hacks or follow us on Twitter or subscribe to our RSS feed.
Do you plan to jailbreak or unlock iOS 4.2.1? Please let us know in the comments section below.
[via Dev Team’s blog]
I await your release of this jailbreak method.
For the last 2 posts go to limera1n.com download n save to desktop run it after follow the the directions after dat ur phone should be jailbroken n then there should be a green rain drop app tap it n install Cydia the unlock is not out yet being 5.14 will be out this week but after it's release it should be under manage>>>sources>>>repo666>>>ultrasnow
I tried limera1n, but is it supported for 3G. in the lime rain description posted in iPhoneHacks ite mentions only iPhone 3Gs and above. Could you please help?
Redsnow is your friend here…
what about my iPod Tou… i mean iPhone4 that i bought whith a built in iOS 4.1,,, when will i be able to unlock it :'(
my band was one of the bands that is unlockable…yet…
use limerain much easier than gp
Thank you Zang.
But is redsn0w available for windows users?
Limera1n for iOS 4.1, and a new one is later released for iOS 4.2, how would I go about upgrading that jailbreak?
Would I have to restore my phone, install 4.2, then jailbreak and THEN reload all the apps I had previously?
Thank you so much
What about if you already have a jailbroken iPhone 3GS using GreenpoisOn? Would you have to jailbreak your phone again once updated to iOS 4.2.1 with new jailbreaking tools? Or will GreenpoisOn still work? Any advice or information will
"would never work… apps installed by itunes are run in a sandbox… they have no access to anything but specific API's outside…"
The sandbox can be washed away with an exploit.
the Dev team blog says the JB is out…can someone confirm if anyone has used it yet….am i the only to c its released…
Truthfully? I'd prefer an Apple TV purchase over an extra cable box, a DVD player, or even a good quality terrestrial antennae. I mean, who REALLY cares about that stuff anymore?
It's the same reason you would buy a DVD player. Many Apple TV owners setup their computers as ZERO-fuss media servers and rip all of their DVDs to video files they can pelt with meta data (thanks Meta X) and access instantly from any room in the house simultaneously. And then there's Netflix (arguably the best implementation on a consumer device), your music, YouTube (old fateful), rentals (I'm shocked I've went for a $1.99 movie I'd wanted to see, but there you are), and Podcasts (the visual directory is excellent)… and now AirPlay. I'm sorry, but in the world most people are in, a $99 price point was a big consideration with Roku the day before Apple released rev. 2 of Apple TV. It's STILL a nice price point for everything you're getting (and that's why Roku lowered their price).
first
oh damn. not first. 
SUCCESS JAIL BROKEN iPHONE4…BRAVO!! THANK YOU!!!
I am having the same problem. I have jailbreak the 4.1 @ 05.14.02 baseband with redsn0w_win_0.9.6b2. Still waiting for the unlock!
yes. redsn0w_win_0.9.6b2
download it here
http://dl.dropbox.com/u/8688186/redsn0w_win_0.9.6b2.zip
Is this confirmed?!?!???!!!??
Hopefully someone can help:
x
I just updated my iPad to iOS 4.2(.1) and want to jailbreak. However, if i jailbreak now with redsn0w and have a tethered JB, will i need to restore so i could get an untethered (when comex does his magic)?
I think id have to but not too sure..
Thank youu
oh, i have SHSH for 3.2.2, if thats significant.
Mish barf 3la2 Wla 2ala2 bs anyway lazm nstna youmeen talata a 3o2bal ma l unlock ynzl isA …. Hanet
I need to unlock the 3G.
My concern is more on installous/cydia apps installed on my jailbroken iPhone 4 on 4.1. iTunes downloaded apps has no bearing to me as i can always install them again. so losing all these JB app previously installed is always a standard consequence once you upgrade and rejailbreak your device? How about this cydia "PkgBackup" where u have an option to backup/restore? Does this do no good w/ such case? tnx!
have an i phone 3g with the ios 4.1 and Modem firmware 05.14.02 how can i unlock it please any one can help. I have jailbroke it.
Thanx Zang and Russel. I have used redsn0w for win and the JB is done. Now waiting for the 05.14.02 unlock.
Will there be an unlock for baseband 05.14.02 or is it a dropped idea
Go Dev Team And Comex!!! Were all waiting for the release here in the phillipines!!!
Cant I just completely restore/reformat my iPhone 4 and then install iOS 4.2 on there and THEN jailbreak and redownload my apps?
sorry if it seems dumb, i'm not planning on unlocking my phone its already stuck with att, i just want to jailbreak it.
i know that the update isnt out yet, but if someone can just briefly walk me through the process if and when it does that would be great, i'm just so scared i'll mess something up =\
I have a jailbroken iphone 3g (more than 1 year old) with OS 3.1.2. Could you please let me know how to upgrade my iphone OS to OS 4.2?
Do I need to upgrade my iphone to OS 4.2 and then jailbreak? please advice.
release unlock already! its been 2 days after 4.2..!