Yep, The iPhone Dev Team have done it again! They have successfully unlocked and jailbroken the iPhone 3G S. But, unfortunately, they do not have an announced release date but will most likely be released after iPhone OS 3.1 is released by Apple.

From iPhone Dev Team’s blog:

Our ultrasn0w program uses the at+xlog crash as an injection vector of our unlocking payload — and it does so on the 3GS in exactly the same way as on the 3G! But this injection vector will be lost if you update to 3.1 using the official Apple IPSW, which updates the baseband. So stay away from official 3.1 IPSWs until we release the tools that let you update the firmware without updating the baseband.

The iPhone Dev Team urge you not to update to iPhone OS 3.1 if you want to be able to unlock your iPhone 3G S. You have been warned!

- source: blog.iphone-dev.org

Well, I know many of you have been waiting for this news, so here it is: iPhone Dev Team has found out that 24kpwn, the same exploit used to crack open into the iPod Touch 2G, lives in the iPhone 3GS bootrom. That means the iPhone Dev Team can apply the same technique that they use to jailbreak and unlock on their current redsn0w tools. The baseband is also exploitable with ultrasn0w. Awesome news, ey?

From iPhone Dev Team:

Important: Apple has not given up on the cat&mouse game, and in fact there are challenging aspects of the 3GS jailbreak that aren’t in the other devices. It’ll take some time to work these into our tools, but the fundamental weaknesses are there: The bootrom is exploitable via 24Kpwn, and the baseband is exploitable via ultrasn0w. (And just like with the 3G, ultrasn0w for 3GS requires that you not update your baseband when Apple comes out with new firmware.)

If you would like to know the technical notes, from the iPhone Dev Team, on where the 24Kpwn exploit is in the 3GS visit here

Now it’s time to wait for the iPhone Dev Team develop and release the tools for users to use and jailbreak and/or unlock their iPhone 3GS’

- source: blog.iphone-dev.org

Yay! iPhone Dev Team have released the long awaited iPhone 3G Unlock, ultrasn0w! Just like yellowsn0w, ultrasn0w unlocks your iPhone 3G.

How to install:

1. Ensure you have upgraded to iPhone OS 3.0
2. Jailbreak your iPhone 3G using redsn0w or PwnageTool (this will also install Cydia/Icy)
3. Run Cydia or Icy
4. Please add the repo repo666.ultrasn0w.com to Cydia or icy
5. Search for ‘ultrasn0w’ in cydia or icy and install ultrasn0w
6. Reboot your iPhone 3G
7. T-Mobile USA users should disable 3G before using ultrasn0w
8. Enjoy

Simple enough, ey? Well, go on! Unlock your iPhone 3G!

Note: This will NOT unlock nor work with the iPhone 3G S

- source: blog.iphone-dev.org

With the release of Redsn0w some days ago, people might be new to redsn0w and might not know how to work it. On this post, we’ll show you how to jailbreak your iPhone/iPod Touch with redsn0w version 0.7.2 - This should be the same as windows on both iPhone and iPod Touch. In this case, we’re using Mac OS X. Please. we can not stress this enough, read through this post carefully before attempting anything with redsn0w.

Note: We are not responsible if your device blows up in the middle of the jailbreak process (not that it will) or if your device doesn’t turn on after using this. Use, strictly, at your own risk!

1. First is first, download redsn0w here (for Windows) or here (for Mac OS X)
2. Second, Download iPhone OS 3.0 or whatever firmware you’ll be using to jailbreak - here

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Update: The iPhone Dev Team have updated Redsn0w to 0.7.2 - Download the newest version from our iPhone Downloads section:
redsn0w 0.7.2 for Mac OS X download
redsn0w 0.7.2 for Windows download

iPhone Dev Team has released an application that works similar to quickpwn and provides similar functionality. Redsn0w is an easy to use, multi-platform, multi-device jailbreaking and unlocking (iPhone 2G only) tool for the iPhone 2G (original iPhone), the iPhone 3G (but not the 3GS) and also the iPod touch (first and second generation). Luckily for Windows users, who couldn’t use PwnageTool, Redsn0w is available for both Windows and Mac OS X users. However, iPhone Dev Team notes that there are some issues using redsn0w with OS X PPC and they suggest you use an Intel Mac till these issues are resolved.

1. GOLDEN RULE: If you are using a 3G iPhone with yellowsn0w and rely on yellowsn0w to obtain cellular service, then you should NOT use redsn0w right now. Ultrasn0w (the 3G carrier unlock) is not included with this release and therefore your baseband will be locked and unable to use an operator other than the official one it was bought for. UltraSn0w will be released via APT (cydia and icy) soon. If you have an original iPhone (1st generation) then 3.0 carrier unlock works with this redsn0w release.
2. Yellowsn0w in its current form will NOT work with the baseband version that is present in the 3.0 update, you will need Ultrasn0w, which will be released sometime soon, Ultrasn0w will work with all iPhone 3G models (but not 3GS), even ones that were previously unlockable, Ultrasn0w (when available) will be released via APT (this means you will be able to get it via Cydia or Icy).
3. Please read all parts of this post before downloading and using these tools.
4. Read items 1, 2 and 3 again and again.
5. This app is suitable for the recent 3.0 release
6. redsn0w will NOT work for the iPhone 3GS.
7. redsn0w WILL work for Original iPhone (1st Generation), Original iPod touch, iPod touch 2G and the iPhone 3G (not the iPhone 3GS).

Redsn0w is easy to use, simply upgrade the device in iTunes to firmware version 3.0 and run redsn0w to activate and jailbreak the device (and if you are using an original iPhone 2G, it will unlock it too!)

Redsn0w download:
redsn0w for windows download
redsn0w for Mac OS X download

*Note*: there are some issues using redsn0w with OS X PPC, please use an Intel Mac while the iPhone Dev Team fixes these issues

- source: blog.iphone-dev.org

w00t. that’s right! iPhone Dev Team has released an updated version of PwnageTool and Quickpwn with added support for iPhone firmware 2.2.1 - which was recently released by Apple a few days ago - if you have an iPhone 3G and you need yellowsn0w, use pwnagetool to create an ipsw that won’t upgrade the baseband to be able to continue using yellowsn0w. The iPod Touch 2G is still not supported - but, redsn0w is still being actively researched and developed.

From iPhone Dev Team’s Blog:

1. GOLDEN RULE: If you have a 3G iPhone running 2.2 firmware and you want to keep your ability to use yellowns0w (or the option to use it in the future) do NOT use QuickPwn, and do not use the official ipsw or the iTunes update process without using PwnageTool.
2. Yellowsn0w will NOT work with the baseband version (02.30.03) that is present in the recent 2.2.1 update. If you want to use Yellownsn0w you will need to create and restore using a custom .ipsw that will allow you to update safely to 2.2.1 without applying the 02.30.03 baseband update. You’ll then have a 3G iPhone running 2.2.1 with an older baseband version that is still vulnerable to yellowsn0w, following these steps ensures that yellowsn0w will still operate.
3. Please read all parts of this post before downloading and using these tools.
4. Read items 1, 2 and 3 again and again.
5. These apps are suitable for the recent 2.2.1 release.
6. The Yellowsn0w version has been updated to 0.9.7. Yellowsn0w is available from Cydia or Installer - this version allows compatibility with pwned 2.2.1 system (not baseband). Again„ remember 0.9.7 yellowsn0w DOES NOT WORK WITH 2.2.1 (02.30.03) directly - you need to be running a ‘pwned’ version of 2.2.1 which didn’t upgrade the baseband during the restore/upgrade.
7. Users of OS X 10.5.6 will be unable to use DFU mode correctly, please see the note towards the end of this post to easily fix this issue.

Download:
PwnageTool v2.2.5 Mac OS X Download
QuickPwn v2.2.5 Mac OS X Download
QuickPwn v2.2.5 Windows Download

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Update #2: iPhone Dev Team has released an update for yellowsn0w, version 0.9.5 beta. So make sure you update!

Update: If you have success or failure on unlocking your iPhone 3G with yellowsn0w, report it to the iPhone Dev Team at report.yellowsn0w.com - Here

Finally! After months of waiting for an iPhone 3G Unlock it’s finally here. Yellowsn0w is available for Installer and Cydia. Yellowsn0w is exclusive for the 2.28.00 baseband. (The baseband provided with the firmware version 2.2 from Apple)

From iPhone Dev Team’s Blog:

BASICS

• The unlock works exclusively with baseband 02.28.00. This baseband is provided by the latest firmware update (2.2) from Apple. You’ll need to upgrade to this release using iTunes and then use QuickPwn to activate etc. There are plenty of tutorials about this on iclarified, bigboss, and other established tutorial sites. Because it works on 02.28.00, it is available to everyone on the planet. This means we don’t need to unnecessarily expose holes in earlier basebands, which is an important concern.
• The application is a small daemon that is launched on boot. It injects the payload at boot and also whenever there is a baseband reset. You won’t notice anything about it other than that your third-party sim now works. It’s a small program and unobtrusive. There is no GUI (this is by design).
• You can add the application using the sources outlined below (coming soon). There are Cydia and Installer sources available, so use whichever you are comfortable using.
• yellowsn0w is completely removable through Cydia, the command line, and iTunes.

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Been having trouble unlocking your iPhone 3G with yellowsn0w? Follow this guide!

Note: This IS beta software, there is no guarantee this will work. Use at your own risk!

First is first, Jailbreak your iPhone (If your iPhone is already jailbroken you may skip steps 1-7)

1. Install firmware 2.2 if you didn’t already (Download it from our iPhone Downloads section: Here
2. Download QuickPwn to jailbreak your iPhone 3G (Again, download it from our iPhone Downloads : Here for Mac
   Here for Windows
3. Pick the desired device, the iPhone 3G of course

Click Images to Enlarge

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Dong Ngo, one of the editors over at CNET, has confirmed that Tuan Anh Do, a 29 year old Vietnamese iPhone hacker, has successfully unlocked the iPhone 3G. Now this isn’t any easy to use free software unlock; you know, what the iPhone dev team have been striving to accomplish, instead we have a complicated hardware unlock requiring removal of the iPhone’s baseband chip. Yeah, this unlock ain’t no joke.

- source: CNET

Update: PwnageTool has been updated to 2.2.1 — This update fixes the bug that is related to ‘Simple Mode’.

PwnageTool 2.2.1 Download (Mac OS X only)

From iPhone Dev Team’s Blog:

• Locked iPhone 3G

If you are using your iPhone with one carrier and have no interest in the possibility of an iPhone 3G unlock in the near future then just restore or upgrade to 2.2 using iTunes and use QuickPwn to Jailbreak and add Cydia and Installer.

• Locked iPhone 2G (1st Generation)

Restore your iPhone 2G with iTunes then run QuickPwn to do the magic, ‘nuff said.

• iPod Touch 1G (Original iPod Touch)

Update to 2.2 with iTunes and run QuickPwn.

• iPod Touch 2G (New iPod Touch)

Sorry, no support at this time.

You can download PwnageTool and Quickpwn from our iPhone Downloads section.

PwnageTool 2.2 Download (Mac OS X only)

Quickpwn 2.2 Download (Mac OS X)

Quickpwn 2.2 Download (Windows)

- source: blog.iphone-dev.org