Requirements for this guide:
1. An iPhone 3G running on iOS 4.0.1
Download: Redsn0w 0.9.6rc16
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2. Download the appropriate firmware for your iDevice using the PwnMyI Firmware Downloader
3. Make sure you have the latest version of iTunes
Step 1: Organizing & Extracting
Organize all of the files that were just downloaded into one folder on your computer.
Next, double click on Redsn0w.zip to extract it.
Open up iTunes on your computer and plug your iPhone in. Let iTunes backup your iPhone.
Wait for iTunes to recognize your iPhone then hold down the “shift” key on your keyboard and click “Restore” in iTunes.
Navigate to the firmware file that you have downloaded, and click “Choose”.
Your iPhone will now install a fresh copy of iOS 4.0.1 on your iPhone. This process is to prevent space from being wasted on your iPhone.
When your iPhone is finished restoring, iTunes will give you the option to restore from a previous backup. Choose the most recent one to get all of your information back onto your iPhone.
Step 3: Jailbreaking
Now it is time to jailbreak the phone. This is extremely easy to do if you follow the directions carefully and correctly.
Open up the Redsn0w app from the Redsn0w.zip you extracted earlier.
Once Redsn0w opens, click the “Browse” button and search for the firmware file you downloaded earlier and then click “Open”.
Once Redsn0w successfully identifies the IPSW, click “Next”.
Redsn0w will then prepare your jailbreak data.
Now select which options you want for your jailbreak.
Click the “Next” button and follow the instructions that Redsn0w gives you.
Redsn0w will now give you a series of steps that will put your iPhone into DFU mode. This will allow the jailbreak software to be installed onto the phone. Follow the steps carefully.
Your iPhone will reboot, and Redsn0w will begin uploading the jailbreak software.
When the software is uploaded, Redsn0w will notify you that it is done. Click “Finish” and wait for your iPhone to reboot.
When your iPhone reboots you should have a new icon on your springboard named “Cydia”. This means you have successfully jailbroken your iPhone. Enjoy!
