NOTE: Those of you who rely on a carrier unlock MUST STAY AWAY from Redsn0w and stock iOS 4.3.2 firmware. Also, the patches for 4.3.2 are said to be broken on this version of Redsn0w. PwnageTool 4.3 with 4.3.2 PwnageTool bundles is the recommended.
For tutorial using a windows computer go HERE:
How to jailbreak iOS 4.3.2 using Redsn0w on Windows and Mac:
Download iOS 4.3.1 (required by Redsn0w 0.9.6 for 4.3.2 jailbreak) for your version of iOS device.
Update/Restore to iOS 4.3.2 firmware using the IPSW file you just downloaded via iTunes 10.2.1.
Start Redsn0w and point it to the official iOS 4.3.1 firmware file (NOT iOS 4.3.2 file).
Create a folder on your desktop called Pwnage
Download RedSn0w from here and place it in the Pwnage folder. Likewise, download the latest 4.3.1 firmware from below and place it in the same folder.
4.3.1 (4 GSM):Download iPhone3,1_4.3.1_8G4_Restore.ipsw
Extract the RedSn0w zip file by double clicking it.
Connect your iPhone to the computer and launch iTunes.
Select your iPhone from the list of devices on the left. Now hold down Option and click the Restore button. Restore is preferred as it won’t create any wasted space on your iPhone.
Navigate to the Pwnage folder on your desktop and select the 4.3.1 firmware ipsw. Click the Choose button to continue.
Once iTunes has finished updating your iPhone to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.
Once RedSn0w opens click the Browse button
Select the 4.3.1 firmware ipsw we placed in the Pwnage folder on our desktop then click Open.
Once the firmware has been verified click the Next button to continue.
RedSn0w will now prepare the jailbreak data
From this window you can select the jailbreak options you would like.
Make sure Cydia is selected and click the Next button to continue
Please plug your iPhone into the computer and make sure its OFF then click the Next button
RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU mode here
Hold down both the Home button and the Power button for 10 seconds.
Release the Power button and continue holding the Home button until RedSn0w detects the device.
Your iPhone will now reboot
RedSn0w will then begin uploading the new RAM Disk and Kernel.
Once this is complete you will be notified that RedSn0w is done. Click the Finish button. When your iPhone finishes rebooting (5 minutes or so) it will be jailbroken with Cydia on the SpringBoard.
REMEMBER THAT AFTER YOU DONE JAILBREAKING IT YOUR IDIVICE WILL NOT BOOT IT WILL STAY ON THE APPLE LOGO, SO HERE IS WAHT YOU DO, FOLLOW ALL THE STEPS AGAIN BUT ON STEP 8 DO NOT SELECT CYDIA AGAIN JUST SELECT JUSTBOOT TETHERED RIGHT NOW. AND THAT’S IT BUT EVERY TIME YOU TURN YOUR PHONE OR IPOD OFF YOU WILL HAVE TO DO THAT, TILL A UNTETHERED JAILBREAK IS OUT.