The iPhone Dev team recently released the final version of their redsn0w jailbreak tool. Coupled with the final recently released ultrasn0w unlock tool for all basebands uptill firmware 3.1.3 and the new iPhone 4 baseband, this is the complete tool to jailbreak and activate ones iPhone 3G, iPhone 3GS and iPod Touch 2G.

The iPhone Dev team has already released unlocks for all firmwares basebands since OS 3.0 up to iOS 4 with Ultrasn0w, for more information check our previous guide to Unlock Baseband 04.26.08, 05.11.07, 05.12.01 and 5.13.04 With Ultrasn0w.

However,in order to install UltraSn0w unlock on iPhone 3G, you first need to jailbreak your iPhone. So here is a step-by-step guide to jailbreak iPhone 3G using sn0wbreeze v1.6 for Windows and Mac users.

Resources

• Redsn0w Tool from Dev-Team

• For Windows – Download here [Mirror 1]  [Mirror 2]
• For Mac OS    – Download here [Mirror 1]  [Mirror 2]

• iPhone 3G iOS 4 Final Firmware Download Here
• iTunes 9.2 Download Here

Instructions:

• Create a folder on desktop and name it whatever you want. Now connect your iPhone to the computer and launch RedSn0w from your folder. In the new Window click on the browse button to navigate to your folder on the desktop and select the iOS 4 firmware ipsw.
• Click the Open button to continue.
• In next Window check the Install Cydia option. Here you can select / unselect more advanced options like verbose boot, multitasking, wallpaper etc. Once you selected all required options click on next button.
• Now turn off your iPhone but make sure it is still plugged in to USB port. After making sure of this proceed to put your iPhone into DFU mode.

• To put your iPhone in to DFU mode follow the onscreen instructions as follows Hold the Power button for 3 seconds, Hold the Home and Power buttons for 10 seconds, then release the Power button and continuing holding the Home button until your iPhone is in DFU mode.
• If all goes well means you put your iPhone in DFU mode successfully then the following screen will appear otherwise you will be prompted to do from Step Five.

• That’s it, after 5 to 8 minute of processing, and a restart of your iPhone, you will have a Jailbroken iPhone.
• You may now proceed to unlock if you wish.