How to Jailbreak iOS 4.3 iPhone 4 Using PwnageTool Bundles & Custom Firmware

iOS 4.3 GM build is already available for download for iPhone 4, 3GS, iPod Touch 3G, 4G & iPad however it is only for developers registered with Apple iPhone developer program.
Warning : Proceed only at your own risk, we take absolutely no responsibility for any damage that may happen to your iPad by following this guide.
Stuff Needed 
Download iOS 4.3 for your device
Download PwnageTool for Mac
Download PwnageTool Bundles
Download Ramdisk fixer 1.5 & Install it
Download iTunes 10.2
Keep all your files on desktop for easy access.

How to Jailbreak iOS 4.3 iPhone 4 Using PwnageTool Bundles & Custom Firmware

1. Right click on PwnageTool App and select Show Package Contents

2. Now navigate to following folder /Contents/Resources/FirmwareBundles
3. Now copy PwnageTool Bundles for iPhone 4.3 iOS and place it in above “FirmwareBundles“ folder and close the folder.

 4. Now start RamdiskFixer_v1.5  and and follow the on screen instructions t& complete the installations (you must comply with readme file of randisk fixer).

 5. Now start PwnageTool and create the iOS 4.3 custom firmware for iPhone 4

6. Now start iTunes 10.2 and create iPhone 4 backup
7. Now put your iPhone 4 in DFU mode by following instructions
Hold Power and Home buttons for 10 seconds, Now release the Power button while continue to holding the Home button. You device should now be in DFU mode
8. iTunes will promot for devince in DFU mode, click Ok.
9. Now press Option and click on update button on iTunes. Now browse and select iOS 4.3 iphone 4 custom firmware.
10. Let iTunes complete the update process, you. Once iTunes completes the restore process your iPhone 4 will reboot.
Since this is tethered jailbreak every time you reboot your deice you need to connect to Mac and tethered  boot using tetheredboot utility.
Follow bellow instructions to Tetethered boot your jailbroken iPhone 4 iOS 4.3
1. Download TetheredBoot Utility and place it in tetheredboot folder on desktop
2. Crate copy of iPhone 4 iOS 4.3 custom firmware, change the extension from .ipsw to .zip and unzip
3.  Now open extracted content of firmware and copy following files present under /Firmware/dfu/
1. iBSS.n90ap.RELEASE.dfu
2. kernelcache.release.n90
4. Place these files inside Tetheredboot utility folder

5.Turn off your iPhone and  Open Terminal, type following commands

sudo -s
cd /User/Desktop/Tetherboot/
./tetheredboot iBSS.n90ap.RELEASE.dfu kernelcache.release.n90

6. Ok, that’s it. Your iPhone 4 will boot into the tethered boot mode
Now enjoy your newly jailbreak iPhone 4 on iOS 4.3. You have repeat above steps every time you reboot your iPhone 4
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