iOS 4.2.1 Jailbroken

Thanksgiving has come a couple of days early for iDevice power users after the infamous Dev-Team released an updated version of their redsn0w utility for iOS 4.2.1.

Engadget spotted the updated release, which came less than 24 hours after Apple released their latest iOS update, and allows iPad, iPod touch and iPhone users to jailbreak their devices. Unfortunately for owners of the iPhone 4, iPad, ''new'' bootrom iPhone 3GS and newer iPod touch models, the 4.2.1 jailbreak is ''tethered'', meaning the user will need to reconnect their device via cable to a PC or Mac everytime their device is rebooted or loses power. The Dev-Team have also advised users to ensure they keep their SHSH blobs for all devices as they may prove necessary for a future, ''untethered'' jailbreak.

Users with an iPhone 3G, iPhone3GS with ''old'' bootrom, and ''non-MC'' series iPod touch 2nd generation have access to an ''untethered'' iOS 4.2.1 jailbreak.

Those unsure of their iPhone 3GS bootrom version can follow a guide from the Redmond Pie blog. Checking whether you have an ''MC'' series iPod touch is as simple as going to the iPod's Settings menu, then General, then About. The letters ''MC'' at the start of the Model field denote an ''MC'' series device.

For those looking to unlock their iDevices, the Dev-Team reported that the situation looks ''very promising'' and gave a tentative release date of this week for an iPhone 3G and 3GS unlock tool. iPhone 4 users should expect a somewhat longer wait, with ''no further concrete info'' available from the Dev-Team. As always, those looking to keep an existing unlock should not update their iOS version until a new unlock tool is made available.

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37 Comments

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Hopefully this works better than when I jail broke 4.1. I mean everything works great other than the fact when I turn the touch on it's side the screen won't rotate

warwagon said,
Hopefully this works better than when I jail broke 4.1. I mean everything works great other than the fact when I turn the touch on it's side the screen won't rotate

Do you have orientation lock enabled?

djdanster said,

Do you have orientation lock enabled?


I got all excited when I researched that. It appears it was turned on. So then i unlocked it and it still won't work

Is it true that when going from an older to newer iOS version that you must reformat completely? I dont want to have to reload all of my media and I dont like the back up feature iTunes has.. I like manually importing all of my files myself but it took me a long time to get it all right ...

este said,
Is it true that when going from an older to newer iOS version that you must reformat completely? I dont want to have to reload all of my media and I dont like the back up feature iTunes has.. I like manually importing all of my files myself but it took me a long time to get it all right ...

Whats wrong with the back-up feature in iTunes? It works really really well. What back-up utility are you using instead of iTunes for your phone? Not backing up because you dislike iTunes is a terrible idea.

Packet1009 said,
you dont need to do anything.
just install and leave it for about 15-30 mins - it'll auto do everything

This is only true for people who aren't jailbreaking.
If you are jailbreaking do a complete RESTORE.
Why? Because otherwise when you update your software the device will become unjailbroken but all the old files from cydia and whatever you installed with it will still be on the device, they will not be used when you jailbreak again though, Cydia and all other apps will get new folders, if you do not do a complete restore you waste space...

Shadrack said,

Whats wrong with the back-up feature in iTunes? It works really really well. What back-up utility are you using instead of iTunes for your phone? Not backing up because you dislike iTunes is a terrible idea.

I just prefer to manually transfer everything over myself. I have an iPod touch and I just copy everything over from my local drive. I dont even have an account with their app store anymore. But I remember when I was trying to go from iOS 2.* to 3.1 it was saying it would have to wipe out my entire iPod. This saddened me because I spent way too much time configuring it the way I liked it. But I wiped it out anyway and started over. I dont want to do that again going to 4.2.* now =\

Hmm...well, considering the backup utility backs up your entire configuration you don't start over when you do a wipe to restore it... you restore from a backup, your configuration is put in place. And some things (like game saves) can only be backed up through the backup utility. But whatever. If you want to do things the hard way, by all means...continue.

yaya 3G unlock this week for 4.2.1. I'm due an upgrade but is good to know i can pass my 3G on unlocked and jailbroken with latest FW

Uplift said,
yaya 3G unlock this week for 4.2.1. I'm due an upgrade but is good to know i can pass my 3G on unlocked and jailbroken with latest FW

Sell it on eBay. I got $400 for my 3GS, bought my wife's iPhone 4 since her 3GS got stolen a day prior.

I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

jamesyfx said,
I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

Agreed, iOS 4.2 is good enough for me.

jamesyfx said,
I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

Yeah, I agree. Not much available for JB that isn't available for non-JB. SBSettings is still good though.

Shadrack said,

Yeah, I agree. Not much available for JB that isn't available for non-JB. SBSettings is still good though.

SBSettings alone is enough for me to JB my iphone. being able to access all those menu settings anywhere by just swiping your finger is awesome.

rajputwarrior said,

SBSettings alone is enough for me to JB my iphone. being able to access all those menu settings anywhere by just swiping your finger is awesome.

/agree

Shouldn't need to JB to get that functionality. It is very useful...like say a bluetooth device or your WiFi connection is bugging out. Easiest fix is to swipe for SBSettings and toggle things off and back on. I've also noticed that sometimes when I drop to edge, if I use SBSettings to turn 3G off and then back on it often kicks me back onto the 3g network. Sucks to have to go through the Settings menu maze to do this otherwise w/o JB.

jamesyfx said,
I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

I agree! I was contemplating it during the iOS 3 days, but with iOS 4 with multitasking and folders, it's a different ball game for me. I prefer to play safe and not care about anything at all, and simply run the official builds.

jamesyfx said,
I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

Agreed. Jailbreaking doesn't offer much to me anymore. I never installed themes. Plus, I'd much rather test out developer builds that Apple seeds.

jamesyfx said,
I've given up with jailbreaking, it's just a pain in the ass to get around things and the end result isn't even that worthwhile.

Unless off course if you need to unlock your iPhone for use with another provider.

Quick Shot said,
I'll stick with 4.1. Is there anything major that's worth upgrading to 4.2 for iPhone 4 users?

Baseband improvements? I personally think it's always a good idea to run the latest build.

Quick Shot said,
I'll stick with 4.1. Is there anything major that's worth upgrading to 4.2 for iPhone 4 users?

Airplay, Airprint (those two requires the correct hardware to use with them), a few sms tones, the free find your iphone, search in webpages and probably a decent amount of bug fixes, that's basically it for iphone 4

4.2 is mostly for the ipad really

Quick Shot said,
I'll stick with 4.1. Is there anything major that's worth upgrading to 4.2 for iPhone 4 users?

The lockscreen hack has been fixed. Also, to the left of the iPod controls (in the multitasking dock thingy), there is now a volume control.... umm... yeah, nothing really THAT compelling. I'd say the free "Find your iPhone" for the iPhone 4 is the most compelling "feature" that should have been available from the start of iPhone.

mm4rley said,
think ill wait for the un tethered JB that @comex is working on just now.

Same. A shame they didn't include a quick and easy way to get to the brightness control on the iPhone/iPod like they did with the iPad. SBSettings and free WiFi internet hotspot functionality is all I JB for anymore.