It even works with non-jailbroken iPhones, but as the developer says, you won’t get very far with one, thanks to Apple’s file system “sandbox”.

Step One

Create a folder called Pwnage on your desktop.

Download the following files and place them in the Pwnage folder you just created:

- RedSn0w

- BL 3.9

- BL 4.6

- 3.0.0 (2G): iPhone1,1_3.0_7A341_Restore.ipsw

Extract the RedSn0w zip file to the Pwnage folder.

Step Two

Connect your iPhone to the computer and launch iTunes.

Select your iPhone from the list of devices on the left. Now hold down shift 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 firmware ipsw. Click the Open button to continue.

Step Three

Once iTunes has finished updating your iPhone to the desired firmware you may launch redsnw0w.exe from the Pwnage folder on your desktop.

Step Four

Once RedSn0w opens click the Browse button

Step Five

Select the firmware ipsw we placed in the Pwnage folder on our desktop then click Open

Step Six

Once the firmware has been verified click the Next button to continue.

Step Seven

Make sure Cydia and Unlock is selected and click the Next button.

Step Eight

We will know need to set the location of our bootloader files.

Click Browse and select the 3.9 bootloader file from the Pwnage folder on your desktop.

Click Browse and select the 4.6 bootloader file from the Pwnage folder on your desktop.

Click the Next button to continue.

Step Nine

Please plug your iPhone into the computer and make sure its OFF then click the Next button

Step Ten

RedSn0w will now guide you through the steps to get into DFU mode.

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.

Step Eleven

Your iPhone will now reboot

Step Twelve

RedSn0w will then begin uploading the new RAM Disk.

Step Thirteen

Once this is complete you will be notified that RedSn0w is done. Click the Finish button.

When your iPhone finishes reboot (5 minutes or so). It will run BootNeuter then be unlocked and jailbroken with Cydia on the SpringBoard.

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Pasted from <http://www.iclarified.com/entry/index.php?enid=4302>

Apple recently has released firmware 2.2.1 for iPhone. It’s not recommended for the upgrade, particularly you’re already using firmware 2.2. Firmware 2.2.1 does not come with any big new feature and only focus on bug fixes. However, not every reader are the same. Some readers are considering the upgrade for whatever reasons. Some may find firmware 2.2 is not stable enough and want to upgrade to 2.2.1. Some may just trick by iTunes and accidentally upgrade the firmware.

This guide is specifically for iPhone 2G (also known as 1st generation iPhone). QuickPwn 2.2.5 is the easiest tool to unlock & jailbreak was developed by Dev Team. These instruction will be shows to you on how to unlock & jailbreak your iPhone for Windows users. This guide is designed for those who own iPhone 2G (2.0/2.0.1/2.0.2/2.1/2.2) and plan for jailbreak & unlock.

Preparation for Jailbreak & Unlock

Step 1:
Make sure you have upgraded to iTunes version 8.0.2 and backup your iPhone data by synchronizing it with iTunes 8.0.2.

Step 2: Download QuickPwn 2.2.5, Bootloader 3.9, Bootloader 4.6 and iPhone 2G firmware 2.2.1. Save them all in the same folder. Extract/unzip QuickPwn22.zip. Make sure you have all the files in place before continue.

Installing iPhone 2.2.1 firmware via iTunes 8.0.2

Step 3: Just connect your iPhone to your computer via USB cable and launch iTunes. Select your iPhone in iTunes. You might see all information about you iPhone and the button “Upgrade” and “Restore” appear in iTunes window.

Step 4: Hold the “SHIFT” key and click the “Restore” button simultaneously. The iTunes file dialog will pop up for you to select the firmware file. Locate the “iPhone1,1_2.2.1_5H11_Restore.ipsw” that you have downloaded in previous step and click “Open”.

Step 5: iTunes will then restore your iPhone with firmware 2.2.1 automatically. Keep your iPhone connected, don’t touch anything and wait until the process complete.

Unlock & Jailbreak using QuickPwn 2.2.5

Step 6: Your iPhone should completely restore to firmware 2.2.1. But it’s still locked right now.

Step 7: Launch QuickPwn 2.2.5 to start jailbreak & unlock. Make sure your iPhone connect via USB cable and then click blue button to proceed.

QuickPwn 2.2.5

Step 8: You are required to provide the firmware 2.2.1 IPSW file. Click “Browse” button to locate the “iPhone1,1_2.2.1_5H11_Restore.ipsw” were you had downloaded in Step 2. You should see a big tick if your firmware file is correct. Then click blue arrow button to proceed.

Step 9: You are required to configure the settings for QuickPwn. Normally, you could mark all checkboxes (i.e. Add Cydia, add installer, Replace boot logo & unlock iPhone). If you would like to keep the Apple logo already in your iPhone, just left “Replace boot logo” unmarked. Click blue arrow button to proceed.

Step 10: Locate the bootloader 3.9 and 4.6 files that you have downloaded at Step 2 by clicking “Browse” button. QuickPwn will show a big tick if they are correct. Then click blue arrow button to proceed.

Step 11: Make sure your iPhone should still be connected with USB cable. QuickPwn requests you to confirm it once again before unlock & jailbreak process will begin. If you’re ready, click blue arrow button to proceed.

Step 12: QuickPwn automatically puts the iPhone into recovery mode. After that, you’ll be instructed to hold Home button for 5 seconds. Then hold home and Power buttons together for 10 seconds. Next, release Power button and continue to hold home button until your iPhone is in DFU mode (QuickPwn will inform you automatically when you’re in DFU mode).

Step 13: During unlocking & jailbreaking process, your iPhone screen shows downloading jailbreak data and flashing NOR progress. What you have to do just keep waiting and don’t touch anything to your iPhone.

Step 14: QuickPwn will let you know the jailbreak process is successful. Your iPhone will be restarted and automatically launch BootNeuter to perform unlock. This process will take 3-5 minutes to complete. Just wait until the process been done and your iPhone will be rebooted again.

Step 15: Now unlocking & jailbreaking process has complete with iPhone firmware 2.2.1 Finally, sync back your iPhone to restore your backups data with iTunes 8.0.2.

Pasted from : http://rdsbc.blogspot.com/2009/02/guide-to-unlock-jailbreak-iphone-2g-221.html