For all those who have upgraded to the Iphone firmware v 3.1.2 an Unlock was released yesterday by GeoHot.
Blackra!n RC3, the Jailbreak tool is available at http://blackra1n.com and includes the new Unlock. There are versions available for both PC and MAC.

For those who have already jailbroken their Iphones running v 3.1.2, Blacksn0w can be downloaded via Cydia by adding the source http://blackra1n.com to Cydia.
Enjoy!
 
 
With the new iPhone 3.1 update, iPhone 3GS users can no longer downgrade from iPhone 3GS 3.1 firmware to iPhone 3GS 3.0. Apple wants users to stay with the most current firmware. There is no way to jailbreak iPhone 3GS 3.1. No custom firmwares are able to be added on iPhone 3GS either. Fortunately, Saurik, the creator of the Cydia application has come up with a solution. It only works for the few that were able to use Cydia’s “on file” system and “hash” their ECID (ECID is the unique chip ID that each iPhone 3GS device has). If you were one of the few, read on below to find out how to downgrade iPhone 3GS 3.1 to iPhone 3GS 3.0. If you were not one of the few, then you are still lucky. iPhone 3.1 can still be jailbroken, but you’ll need to wait until a full jailbreak solution is out. I’ll post the guide here once it’s out.

How to Downgrade iPhone 3GS 3.1 to iPhone 3GS 3.0 If you are on Windows Vista or Windows 7 you will need to run Notepad as Administrator and then locate the hosts file and edit it. Then move on to step 4.

1. Press Windows + R on your keyboard or go to Run.



2. Type in the following: C:\Windows\System32\drivers\etc\hosts.



3. Click OK. You should now get an Open With window. Click on Notepad and then click OK.



4. Your hosts file will now open in Notepad. Make a new line below 127.0.0.1 localhost and copy and paste in the following:

74.208.105.171 gs.apple.com

5. Click File – > Save in Notepad. Where it says “Save as type” make sure you select All Files and then click Save.

6. Download iPhone 3GS 3.0 (iPhone2,1_3.0_7A341_Restore.ipsw) and save it to your desktop. If you haven’t already, download iTunes 9 and install it.

7. You must now put your iPhone 3GS in Recovery mode. Connect your iPhone 3GS to your PC. Hold down the top iPhone 3GS button and the bottom home button for 10 seconds, let go of the top button but continue holding the bottom home button until iTunes displays the following message: “iTunes has detected an iPhone in recovery mode. You must restore this iPhone 3GS before it can be used with iTunes.” Your iPhone 3GS screen should be black.

8. Open iTunes, press shift on your keyboard and click “Restore“. Locate the iPhone 3GS firmware 3.0 file you downloaded in step 6 and iTunes should now begin restoring it.

Troubleshooting

  • If you get unknown error (3002), it means your Cydia on file system was not hashed. You cannot ever downgrade to firmware 3.0. Just stay on iPhone 3GS 3.1 firmware for now and wait for the iPhone 3.1 jailbreak to be released.
 
 
from QuickPWN:

Apple released their iPhone 3.1 firmware on September 9, and now the iPhone Dev Team has released their Pwnage Tool 3.1 software which can jailbreak iPhone 3.1. There is no Windows Pwnage Tool 3.1, it only works for Mac. If you’re a Windows user then you’ll have to wait for the iPhone Dev Team to release redsn0w. If you’re a Mac user, then follow the steps below to jailbreak iPhone OS 3.1.

The Pwnage Tool 3.1 software only works on the following devices: iPod Touch 3.1.1 (first generation only), iPhone 3.1 (first generation), and iPhone 3G 3.1. As of right now the iPhone 3GS, iPod Touch 2nd generation, and the new iPod Touch 3rd generation are not supported.

How to Jailbreak iPhone 3.1 with Pwnage Tool 3.1

1. Download Pwnage Tool 3.1 (Filename: PwnageTool_3.1.dmg Filesize: 23.1 MB).



2. Double-click the Pwnage Tool icon to launch Pwnage Tool. You may get a message that says “PwnageTool is an application downloaded from the Internet. Are you sure you want to open it?“. Just click Open.



3. When Pwnage Tool 3.1 launches you will see a message that says “Copyright 2009 iPhoneDevTeam. This software is not for commercial use. If you bought this software demand a refund. It is not for sale. We are not responsible for any damage this software may do to any of your equipment, BE WARNED.” Just read it and click Ok.



4. Click on the device you want to jailbreak. I have an iPod Touch so I’ll click the iPod Touch in Pwnage Tool. After selecting the device click the arrow in the bottom right corner.

5. Pwnage Tool will now attempt to locate the IPSW file for your device. If you don’t have it downloaded already, here are the download links (iPod Touch download links will not be added here because they expire):



6. Once Pwnage Tool finds your IPSW click on it. If it doesn’t find it then you can manually browse and locate it. Click the blue arrow in the bottom right corner of the Pwnage Tool application to continue.



7. Pwnage Tool will now show a message saying something like “We will now create an ipsw file that you can use to restore your iPod Touch (2G) with iTunes. This file will be placed on your desktop. Do you want to continue?“. Click Yes.



8. Pwnage Tool will now start building the IPSW. You will be prompted to enter in your password, just enter in your password and click Ok.



9. Once your IPSW has been buit, Pwnage Tool will display the following message: “Has your iPod Touch (2G) been Pwned before (does it have the pineapple logo)? If you are unsure click No.“. Just go ahead and click No.



10. Time to put your device in DFU mode. Pwnage Tool will guide you through the steps.

11. Once you have successfully put your device in DFU mode Pwnage Tool will display the following: “Successfully entered DFU mode! Close the Pwnage Tool application, start iTunes and restore with your custom firmware bundle.” Just click Ok.

12. Now open iTunes (make sure you have iTunes 9!). If you don’t have iTunes 9 then download it and install it now.

13. Once you launch iTunes 9, press option on your keyboard and click Restore in iTunes. Find the IPSW file that is named something like iPod1,1_3.1.1_7C145_Custom_Restore.ipsw. Make sure it has Custom in the name of the file and then click Choose.



14. iTunes will now restore the custom IPSW file to your iPhone or iPod Touch. Once it’s done you’ll see Cydia and Icy on your device! Congratulations, you are done jailbreaking iPhone 3.1 firmware.

You can jailbreak iPhone 3GS 3.1 and iPod Touch 3rd generation, but the jailbreak is not out for it yet. I’ll create a guide on how to jailbreak it once the software for it is released. Stay tuned!
 
 
An SMS hack was recently discovered for the IPHONE. The exploit uses text messaging to compromise the Iphone.
Iphone firmware 3.0.1 fixes the exploit.
If your phone is Jailbroken/Unlocked, you can update the firmware using Itunes, then rerun redsn0w pointing at the 3.0 firmware .ipsw file. You can then unlock the phone again. Although you are jailbreaking with the 3.0 firmware, the exploit fix will remain installed.
 
 

In many cases , the Cydia application fails to install or update apps after jailbreaking your Iphone with v3.0. There seems to be a conflict with the ICY and Cydia Apps installed on the jailbreak.

To fix:

1.       Backup your phone

2.       Re-jailbreak your phone using redsnow.

3.       Deselect Cydia,

4.       If you’d like ICY installed select ICY

5.       When the jailbreak completes, you should have a working install of ICY and Cydia.

 
 

I took the plunge and upgraded my Iphone firmware to V3.0 last night. I have not checked out the new features as of yet, keep tuned for more

Here's how to upgrade, jailbreak and unlock v3.0

Sync- make sure you sync your Iphone, as the 3.0 firmware will delete all the data and apps on your phone. After the upgrade you can re-sync the data and apps back to the Iphone.
Note: Apps added with Cydia or Installer will need to be reinstalled manually.

Download- You will need the following
Itunes 8.2
Iphone V3.0 Firmware (download through Itunes 8.2)
redsn0w (available at blog.iphone-dev.org)

Install- You will be prompted to install the V3.0 update, click on update and wait for the process to complete.

While you are waiting, install redsn0w (the 3.0 jailbreak) by Extracting redsn0w-win_0.7 to C:\

Jailbreak- Once your phone has been updated; it's time for the Jailbreak. Locate the 3.0 firmware update; the updates are stored in C:\Documents and Settings\Username\Application Data\Apple Computer\iTunes\iPhone Software Updates. Copy the file to c:\redsn0w-win_0.7\
Take the firmware file and drop it onto redsn0w.exe
Check the boxes to install CYDIA and ICY.
Wait for a message to come up saying please connect your iPhone into DFU mode. Then connect your iPhone to the computer if you haven’t already done so, and hold down
the Power and Home buttons for 10 sec. (If the apple screen comes up you have gone too far)
Then let go of the Power but keep holding onto the Home button. Hold it for at least 30 sec or until it reconnects to the computer.
Go to the Command Prompt window (from the start menu, select run and type cmd and and press enter.) When the command window comes up, press enter.

Unlock- now that you have updated your firmware and jailbroke your phone, it’s time for the Unlock.
Run Cydia or Icy
add the repo repo666.ultrasn0w.com to Cydia or icy
Search for ‘ultrasn0w’ in cydia or ICY and install, then reboot the Iphone.

Final Steps- Now that the IPHONE is updated, jailbroken and unlocked, it’s time to resync the phone to Itunes. You may want to review the sync options in Itunes to insure your apps and data will be synced the way you'd like.
After Syncing your data and apps back to the Iphone, check the APP Store application for updates, as many apps have been updated to work with 3.0.
If you had any Cydia applications, you can reinstall them using Cydia or ICY.
Finally, enjoy!

Now that you are unlocked, you may want to tether your Iphone, also be sure to checkout my updated list of top apps for iphone 3.0

 
 

The release of Ultrasn0w, the software unlock for firmware v3.0, has been delayed. There is currently an issue with the unlock that disables the YouTube application. The Dev-Team are working on resolving the issues and hope to have it released soon.
redsn0w, which is currently out, provides a jailbreak for the new firmware and will include the Ultrasn0w unlock tool when it is released.
Before making any changes to your Iphone, I recommend reading the golden rules from the dev-team site.

  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. At the bottom of this post are the bittorrent files for the latest version of redsn0w.
  6. This app is suitable for the recent 3.0 release
  7. redsn0w will NOT work for the iPhone 3GS.
  8. redsn0w WILL work for Original iPhone (1st Generation), Original iPod touch, iPod touch 2G and the iPhone 3G (not the iPhone 3GS).
To use redsn0w 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!)