Sn0wbreeze 3.1.3 has been released which can jailbreak iPhone 2G, 3G and iPhone 3GS on the latest iPhone 3.1.3 firmware. One thing which is to be noted here is that it will work with iPhone 3GS only if it has the older bootrom (non-MC model). iPhone 3GS users who have upgraded to the stock 3.1.3 are still out of luck.

Follow the simple step by step guide below to jailbreak your iPhone 2G, 3G and iPhone 3GS (old bootrom only) on iPhone firmware 3.1.3 using Sn0wbreeze. This version of Sn0wbreeze is for iPhones only. iPod touch 1G/2G (older non-MC models) can use redsn0w to jailbreak on 3.1.3 firmware. iPod touch 3G is currently not supported. Guides for jailbreaking iPod touch 1G/2G (older non-MC models) can be found here, here or here.

Step 1: Download and install the latest version of iTunes.

Step 2: Now start iTunes and sync your iPhone with your PC so that it backs-up all your important data including settings, apps, music, contacts and photos.

Step 3: Download Sn0wbreeze and the original iPhone OS 3.1.3 for your version of iPhone (download links given below). Move all these files to your desktop.

Step 4: Start Sn0wbreeze and select “Simple Mode”.

Step 5: Sn0wbreeze will now ask you to browse for your .ipsw file. Select the correct 3.1.3 firmware .ipsw file by clicking the “Browse” button. Sn0wbreeze will verify the selected file and then will present you with following screen.

Step 6: Click on "Yes" when Sn0wbreeze asks you “Do you want to activate your iPhone?” for hacktivation. Click on “No” only if you are on an officially supported carrier like AT&T.

Step 7: Sn0wbreeze will now create the custom .ipsw file for your iPhone which will be jailbroken.

Step 8: Now you will have to restore your iPhone to this custom firmware 3.1.3 that you just cooked using Sn0wbreeze for your iPhone. Click on your phone from the sidebar in iTunes and then press and hold left “Shift” button on the keyboard and then click on “Restore” (Not “Update” or “Check for Update”) button in the iTunes and then release the “Shift” button.

This will make iTunes prompt you to select the location for your downloaded custom firmware 3.1.2. Select that custom .ipsw file and click on “Open”.

Step 9: Now sit back and enjoy as iTunes does the rest for you. This will involve a series of automated steps. Be patient at this stage and don’t do anything silly. Just wait while iTunes installs the new firmware 3.1.2 on your iPhone. Your iPhone screen at this point will be showing a progress bar indicating installation progress. After the installation is done, iPhone will restart automatically and you should now have a fully jailbroken iPhone running on firmware 3.1.2.

How to: Unlock iPhone 3G/3GS on 3.1.3:
You can now follow the tutorial/guide posted here or here to unlock your iPhone 3G and 3GS (old bootrom only) on firmware 3.1.3 using ultrasn0w or blacksn0w respectively.

Step 10: Once you are done with the unlocking and jailbreak process. You can now restore all your settings, apps, music, contacts and photos to the newly installed firmware version 3.1.3 by restoring the backup that you made in Step 2 from iTunes.

Feel free to ask me any question here should you run into any problem during the jailbreak process.

Note for iPhone 3G and 3GS Users (New Bootroms): We strongly suggest that you stay away from this official upgrade until and unless the DevTeam or George Hotz releases new jailbreaking and unlocking tools for 3.1.3 firmware. We will let you know when it will happen. In the meantime you can follow our complete jailbreaking and unlocking guide for iPhone 3.1.2 firmware using blackra1n, PwnageTool, redsn0w, sn0wbreeze, ultrasn0w and blacksn0w.

P.S. I haven’t tried this method on my iPhone 3GS yet. I will personally wait for other success stories before I give mine a try. ONLY TRY IT AT YOUR OWN RISK.

Disclaimer: This guide is for testing & educational purposes only. Follow it on your own risk. I’m not responsible for any loss of important data or malfunctioning of your iPhone.

3.5 (required to run Sn0wbreeze)
Download sn0wbreeze 3.1.3 for Windows [Fast Mirror link]

****  Use Redsn0w 0.9.4  ****

 The iPhone Dev-Team has just released redsn0w 0.9.4 to jailbreak and unlock iPhone 2G, iPhone 3G (No unlock for 3G), iPod touch 1G and iPod touch 2G (older Non-MC models only).
Do not update to iPhone 3.1.3 firmware yet if you want to preserve your unlock for iPhone 3GS, iPhone 3G, iPod touch 2G (new models) and iPod touch 3G. This is because the new iPhone 3.1.3 firmware updates baseband to 05.12.01 on iPhone 3GS and iPhone 3G which makes it impossible to jailbreak and unlock iPhone 3GS and 3G. Follow the simply step by step instructions below to jailbreak and unlock iPhone 2G, jailbreak iPod 1G/2G (older models only) on 3.1.3 firmware. You can also jailbreak iPhone 3G with redsn0w 0.9.4 but doing so will make you loose your unlock.Note: In this guide I have used redsn0w 0.9.4. If this version gives you problem on iPhone 2G and iPod touch 1G, then try redsn0w 0.9.3. Download redsn0w 0.9.3 from here and then follow the instructions as follows.

NOTE: The instructions posted here almost similar to the one we posted earlier with redsn0w 0.9.3 for iPhone 2G and iPod touch 1G/2G. The only difference here is that we are using the latest redsn0w 0.9.4 from Dev-Team which is specially released for this firmware update.

Step 1: Update to original iPhone 3.1.3 firmware via iTunes. Downloading and installation instructions for iPhone 3.1.3 firmware can be found from here. 

Step 2: Start redsn0w 0.9.4 and point it to the respective original iPhone 3.1.2 firmware to proceed. Yes you need to point it to iPhone 3.1.2 instead of 3.1.3 because redsn0w 0.9.4 is still unable to validate the latest firmware. 

Step 3: Now select “Install Cydia”, “Unlock” and “Already pwned” options for iPhone 2G.  

4: Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.

Step 5: Connect your device in recovery mode by pressing the Power and buttons continuously. At this stage you will be presented with a screen where you will have to quickly hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.

Step 6: Sit back and enjoy while redsn0w will do all the rest for you. Once done, your iPhone 2G will restart automatically and you will find it jailbroken with iPhone firmware version 3.1.3.Unlock for iPhone 2G Only

Step 7: Once you are done with the jailbreak, you can now unlock your iPhone 2G running jailbroken firmware 3.1.3 by using BootNeuter app from Cydia. Follow the instructions from Step 4 here to unlock iPhone 2G on 3.1.3 firmware.

Disclaimer: This guide is for testing & educational purposes only. I’m not responsible for any loss of important data or malfunctioning of your iPhone.

Note for iPhone 3G and 3GS Users: We strongly suggest that you stay away from this official upgrade until and unless the DevTeam or George Hotz releases new jailbreaking and unlocking tools for 3.1.3 firmware. We will let you know when it will happen. In the meantime you can follow our complete jailbreaking and unlocking guide for iPhone 3.1.2 firmware using blackra1n, PwnageTool, redsn0w, sn0wbreeze, ultrasn0w and blacksn0w.

UPDATE 1: Sn0wbreeze 3.1.3 -V1.3 is LIVE! Follow the guide posted here to jailbreak iPhone 2G, 3G and iPhone 3GS (older bootrom only) on iPhone 3.1.3 firmware. iPhone 3G and 3GS can then be unlocked using ultrasn0w or blacksn0w. iPhone 2G can be unlocked using the guide posted here.

UPDATE 2: PwnageTool 3.1.5 for Mac OS X is now LIVE! Follow our complete step by step guide posted here to jailbreak and unlock iPhone 2G, 3G, 3GS and iPod touch 1G, 2G on iPhone OS 3.1.3.Download iTunes 9.0.3 for Windows and Mac

Download the Original iPhone OS 3.1.3 firmware for iPhone
Download the Original iPhone OS 3.1.2 firmware for iPhone
Download redsn0w 0.9.4 for Windows [Fast Mirror link]
Download redsn0w 0.9.4 for Mac [Fast Mirror link]