How to Jailbreak your iPhone 4.3 GM Edition with PwnageTool Bundles
Step 4: Next, make sure the Universal Ramdisk Maker you downloaded is installed (just follow the on screen instructions). Launch PwnageTool in expert mode, select your device, and point it to that 4.3 GM firmware. PwnageTool will now create the custom firmware for your iPhone.
Step 5: After it is done creating the new ipsw, take note of where it is saved and open up your iTunes. With your device plugged in, hold down the ‘option’ key and click restore. locate your custom ipsw and let iTunes load it up!
Step 6: Take that custom firmware file we just used and change the extension from .ipsw to .zip and then extract it. Your looking for 2 files, firmware -> dfu -> and yep, those 2 files. copy them. Make 1 more folder and call it “tetheredboot” and paste the files inside it. Now remember that tethered boot utility you downloaded earlier? Extract it and move it into your tethered boot folder, and turn off your iPhone.
Step 7: Start your mac terminal app and type in:
enter your admin password and then:
Step 8: After some lines of code it will ask you to put your device in DFU mode : hold power button for 10 seconds -> continue holding power button and press home for 10 seconds, and voila! Just wait and your device will boot in tethered jailbreak mode. Once it’s loaded disconnect and enjoy!