-Update your iTunes to the latest version, download Sn0wbreeze and the 4.3 firmware for your device using the links above.
Step 2
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-Open Sn0wbreeze and click the blue arrow button to proceed to the next step.
Step 3
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- Click the browse button and select the 4.3 firmware that you downloaded a few minutes ago. Once its done click the blue arrow to continue.
Step 4
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-When given the option to select your mode chose expert mode. Next go through the options to set the jailbreak how you want it. Make sure to check Build IPSW and the click the start button to begin creating the custom firmware.
Step 5
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-Once you get the notification saying it is done creating the custom firmware continue on to the next page which will ask you to put your device into DFU mode. This can be done by plugging your device up to your computer and turning it off. Now hold the home and power buttons for 10 seconds and then release the power button while continuing to hold the home button for 30 more seconds. If done correctly Sn0wbreeze will tell you to restore in iTunes.
Step 6
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-Open iTunes and on the tab for your device hold the shift key in while clicking the restore button. You will now have a popup where you will select the custom firmware that Sn0wbreeze created. The firmware will start with Sn0wbreeze and end with .ipsw. Once its done restoring go ahead and close iTunes and you will have a jailbroken iOS 4.3 device!
How to Boot In Tethered Mode
Step 1
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-Locate and open up the iBooty for 4.3 folder on your computer (Sn0wbreeze will add this for you when you jailbreak).
Step 2
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-Open the iBooty.exe file and select your device from the drop down menu.
Step 3
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-Before you hit start prepare to put your device into DFU mode by turning it off and plugging it up to your computer. Now hit start and it will count down for 5 seconds so you have time to prepare. Now hold the home and power buttons for 10 seconds and then release the power button while continuing to hold the home button for 30 more seconds.
Step 4
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-iBooty will do its thing and then your device will turn on ready for you to use. Now enjoy your jailbroken device!
Video Tutorial
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*Read the Disclaimer / Warning section BEFORE you jailbreak!!!*
Credit for the jailbreak goes to Sn0wbreeze. Most credit for the tutorial goes to TysiPhoneHelp.