Download Redsn0w 0.9.6b2 To Jailbreak iPhone 3G and iPod Touch 2G on iOS 4.x

Chronic Dev Team has just now released Redsn0w Version 0.9.6b2 for Windows as well as Mac OSX. Redsn0w is basically a lightweight, multi-platform jailbreaking, unlocking and customizing tool for the iPhone 2G (original iPhone), iPhone 3G, iPhone 3GS, iPod touch 1G, iPod touch 2G, and iPod touch 3G. This release of Redsn0w is specially targeted towards iPhone 3G users and iPod Touch 2G folks, waiting to jailbreak their devices on iOS 4.1 and iOS 4.2 Beta.


it is also important to mention that Redsn0w actually upgrades your baseband while jailbreaking so ultrans0w unlock might now simply work. People relying on carrier unlock after jailbreak are requested to stay away from this build until there is a clear go ahead from Dev Team through their blog post.

Download-Redsn0w-0.9.6b-2

Here are the exploits and credits for this version of Redsn0w (courtesy In-Folder Credits file In Redsn0w Package):
limera1n for iPhone 3GS, iPhone4, iPad, iPod touch 3G, iPod touch 4G:
   vulnerability: geohot
   exploit: geohot
24kpwn for iPod touch 2G and early-model iPhone 3GS:
   vulnerability: pod2g, MuscleNerd
   exploit: planetbeing, CPICH, posixninja, chronic
Reference Links:
Download Redsn0w To Jailbreak iPhone 3G and iPod Touch 2G on iOS 4.1 And iOS 4.2 Beta

Download PwnageTool 4.1 To Jailbreak iOS 4.1 On iDevices

Chronic Dev Team just released the new PwnageTool 4.1 that jailbreaks iOS 4.1 iPhone 4, 3g, 3GS along with iPod Touch 2G / 3G / 4G and AppleTV 2G. According to the official Dev Team Blog, couple of exploits namely Limera1n along with some other have been integrated within the package, making it the most powerful custom firmware iDevice jailbreak tool to date.

The jailbreak is untethered and categorically works on:
  • iPhone 4
  • iPhone 3G
  • iPhone 3GS
  • iPad [3.2.2 Firmware]
  • iPod Touch 3G
  • iPod Touch 4G
  • Apple TV 2
PwnageToolAppleTV2_thumb1

This is what the Dev Team has to about the PwnageTool 4.1
PwnageTool allows you to restore to a custom IPSW file.  For instance, you can restore to a pre-jailbroken firmware while simultaneously maintaining your current baseband (and thus your ultrasn0w carrier unlock).  You can also add whatever packages you want in the “Expert” mode of PwnageTool, if you wish to pre-install Cydia packages.   iPhone 3G users get the additional benefit of selecting their own boot and recovery logos, and features like multitasking and battery charge percentage.
PwnageTool’s main advantage to ramdisk-based methods (limera1n, greenpois0n, redsn0w) is for unlockers — those that need to keep their current baseband and preserve their ultrasn0w unlock.  But in this new age of both bootrom- and userland-based exploits, it’s an excellent platform for continuing the jailbreak through all future firmwares.  More on this later!  In the meantime, please enjoy this free software and please provide any usage feedback in our comment section below…
The above statements clearly indicates that all those folks who rely on a carrier unlock are welcome to use this tool in order to jailbreak their iPhone 4, iPhone 3G and 3GS.

This tool, unlike previous releases, preserves the device’s baseband which is unlockable with Ultrasn0w.

PwnageTool, for now, is intended for MAC users only and we expect a non-mac version to make it out soon too.

Download PwnageTool 4.1 To Jailbreak iOS 4.1

Download Greenpoison iOS 4.1 Jailbreak For iPhone 4 / 3GS

Geohot released Limera1n just two days back on 10/10/10 spoiling the hard work of Chronic dev team. The team was heartbroken and left with two choices, either use the SHAtter bootrom exploit and implement Geohot’s bootrom exploit which was used in Limera1n, or go ahead and burn two bootrom exploits at once by releasing GreenPoison.

Burning two bootrom exploits at once means Apple will patch them quickly, thus slowing down future jailbreaks. So the team went with the decision to implement SHAtter bootom exploit instead. Today Greenpoison is out with this exploit which jailbreaks the following devices:
  • iPhone 4 / iPhone 3GS
  • iPod Touch 4G / iPod Touch 3G
  • iPad
As of now only Windows version of Greenpois0n is available. Mac version will be out soon.
greenpoison jailbreak iphone 4
Download Greenpoison to jailbreak iPhone 4, iPhone 3GS, iPod Touch 4G, iPod Touch 3g, and iPad.

What Is Tethered And Untethered iPhone Jailbreak


In the world of iPhone jailbreak and unlocking, two terms that often come up are tethered and untethered. While experienced users are already pretty familiar with what this means, it often boggles down novice users who are new to the jailbreak frontline. In this article we’ll explore what these term mean, why some jailbreaks are tethered, what are the advantages and disadvantages, and what is the current status of iOS devices when it comes to jailbreaking.



WHAT IS TETHERED JAILBREAK?

Tethered literally means ‘attached’, and this is exactly what these kinds of jailbreaks are. In definition terms, a tethered jailbreak is one in which a jailbroken device cannot reboot (not from standby, but from complete power off) unless it is attached to a computer. Such a device, if powered off, will go into recovery mode (or recovery loop) infinitely when rebooted unless it is attached to a computer and the same program that was used for jailbreak, will bypass the Apple logo and boot the device again.

The first tethered jailbreak was GeoHot’s blackra1n, the first of its kind that could jailbreak iOS 3.1.2.

WHY TETHERED?

This requires a little in-depth explanation, and an understanding of how jailbreaking works. Apple’s iOS is a brilliant structure constructed in layers, with iBoot being the lowermost layer in the chain of trust. Every iDevice runs with a processor chip, which is governed by the iBoot code, the same code that initiates the boot sequence. iBoot itself has a signature check built-in which, at the time of boot, verifies that the software installed on the device is genuine, non-modified Apple programming. In the entire iOS structure, there is a signature check at every level, enabling Apple to ensure that only their signed (or approved) software can be run on any iDevice.

A jailbreak software uses a loophole in Apple’s signature checking process and injects a certain code that allows unsigned software to be loaded, bypassing the check and balance sequence. While these exploits may exist at any level, the best scenario would be finding an exploit in iBoot, so that the signature check fails right from the booting sequence. The biggest advantage of a bootrom exploit is that it cannot be closed with a new software release – bootrom can only be modified with a hardware revision.

Such an exploit was discovered prior to iOS 3’s release, codenamed 24kpwn, which allowed the jailbreak software to inject 24kb of modified code into iBoot, and iBoot would consider that perfectly normal. This particular string of ‘injected’ code would bypass the signature check and everything thereon became a breeze.

Apple was quick on the uptake, and at that time the new line of iPhone 3G and iPhone 3GS contained a patched iBoot, rendering existing jailbreaks useless. When GeoHot released his blackra1n tool, he managed to find a way to bypass iBoot’s security check, but only if the device was connected to a PC and the jailbreak software actually communicating with the device. Hence the first tethered jailbreak was born.

As of today, there have been a few tethered jailbreaks – QuickPwn, purplera1n, blackra1n, and sn0wbreeze 2.0, which jailbreaks iOS 4.1 on devices older than iPhone 4 and iPod Touch 4G.

IS TETHERED JAILBREAK GOOD?

On the whole, no. A tethered jailbreak means every time there is a need to reboot your device, you’ll lose jailbreak. What’s worse, not only will you lose jailbreak, your device will not boot either. Consider yourself to be traveling, and your phone’s battery runs out – now you’re practically left with an expensive paperweight unless you can find a PC with the right jailbreak tool available. So, tethered is not good.

It is worth mentioning here that in case of a tethered jailbreak, even though you cannot boot your device without a PC, that doesn’t mean you’ll lose your apps or customizations. The only reason a tethered jailbreak requires the assistance of a computer is because iBoot cannot pass the installed OS as genuine; it reads it as a modified (unsigned) one. The tool in your PC overrides iBoot itself, and so, the OS remains as it was before, but you get the device booted.

WORKAROUND FOR TETHERED JAILBREAK

When GeoHot’s blackra1n tethered jailbreak was the only solution for devices running iOS 3.1.2, an interesting device with the name of iDongle surfaced that connected to the iDevice’s dock and rebooted a tethered-jailbreak device preserving the jailbreak. The device worked only with iOS 3.1, 3.1.1, and 3.1.2, although a USB-based upgrade was possible.

SO WHAT IS UNTETHERED JAILBREAK?

Pretty much everything other than the four tools I mentioned above. Technically, an untethered jailbreak is one in which your device stays jailbroken even after a full reboot, and iBoot is bypassed normally. Examples of such jailbreaks are numerous, ranging from redsn0w to greenpois0n and beyond, which all jailbreak the device permanently without need of support from any other medium. Generally, these jailbreak tools use such an exploit that bypasses the iBoot sequence on its own, hence eliminating the need to connect with a computer.

THE BOTTOMLINE

As of now, there is no device that requires a tethered jailbreak. There have been rumors off and on, especially the latest bootrom exploit SHAtter was anticipated to be tethered, but in the end it didn’t prove to be so. However, as the development continues on the iOS scenario, and new devices keep coming, it may not be long before we get to see another tethered jailbreak.