How To Jailbreak & Unlock iPhone 4 & iPhone 3GS On iOS 4.3.1 Using Sn0wbreeze [Windows]

Just a minute ago, @iH8Sn0w released an updated version of Sn0wbreeze 2.4 Beta 1,
which not only supports iOS 4.3.1 Jailbreak, it also support Ultrasn0w for the following basebands only (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00). Keep in mind this is not a Untethered Jailbreak. The Dev Team�s are working on untethered jailbreak for iOS 4.3 / iOS 4.3.1 and is expected to be released soon. For those who can�t wait, you use Sn0wbreeze 2.4b1 (Tethered Jailbreak), which can jailbreak all iOS device (iPhone 4, iPhone 3GS, iPodTouch 4G, iPodTouch 3G, iPad) running iOS 4.3.
Sn0wbreeze 2.4b1 � Details

• ultrasn0w now works for basebands (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00)
• ultrasn0w is NOT compatible with the folllowing basebands! (02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04)
• iOS 4.3.1 is now supported.
• iPhone 3GS users can upgrade to 06.15.00 baseband now under Unlocks section in Expert.
• Upgrading your iPhone 3GS baseband to the 06.15.00 iPad baseband hack to unlock MAY cause you to lose your GPS!

How To Jailbreak & Unlock iPhone 4 & iPhone 3GS Running iOS 4.3 Using Sn0wbreeze 2.4b1

Step 1: Download the required files � Links posted at the bottom of the post
Step 2: Launch Sn0wbreeze 2.4 BETA 1 and Click Ok on the disclaimer.
Step 3: Click Next � Blue Arrow in the bottom right corner
Step 4: Click on Browse, Navigate to the Original iOS 4.3.1 Firmware and Click Open
Step 5: Let it verify the IPSW file. Once Verified Click Next
Step 6: Now, click on Expert Mode (Selecting Baseband Prservation Mode will only preserve your iPhone baseband. It will not Jailbreak your iPhone)
Step 7: Now, Click on General and then click on Next
Step 8: Check mark, Activate The iPhone to hacktivate your iPhone  (Do this if you don�t have your original iPhone SIM) , Check mark Install SSH and then Click Next.
Step 9: Now, If you want to add any custom packages add them here. If not, just click Next
Step 10: Now, Click on Build IPSW and Click Next to cook custom firmware.
Note: By now, Snowbreeze should create custom cooked IPSW file for your device. And you will also notice a iBooty Folder for iOS 4.3. You need this to tethered boot into your iOS device.

Step 11: Once the custom firmware is cooked, Connect your iOS device and turn it OFF.
Step 12: Now, follow the on screen instructions to put your iOS device in PWNED DFU mode.
Step 13: Once your iOS device in PWNED DFU mode, Launch iTunes
Step 14: Hold down SHIFT KEY and Click on Restore on iTunes, Navigate to the custom cooked IPSW file, which should be saved on your desktop, and click on Open.
Step 15: Now, just sit and relax, iTunes will take care of the rest.
via[MacHackPc]

Download Links

• Download Sn0wbreeze 2.4 BETA 1� For Windows
• Download iOS 4.3.1 For all iOS Device � Direct Links
• Download iBooty 4.3.1 - This will be created by Sn0wbreeze when you create custom firmware.