iPhone 2.2.1 Upgrade for 2G in 3 Steps!
Here are the 3 steps:
1. Plug your iPhone to the Computer or Laptop. Wait for iTunes to pop up. If it doesn’t, then open it. iTunes will tell you that a new version is available (2.2.1) . Click “Download“! And NOT “Download and Install”. Wait for it to install. Now open your iPhone Tab and look for an “Update Button”, it should be above the “Restore” Button.
2. Download QuickPwn 2.2.5-2 for Windwos (Official Torrent) and unzip it, then download Bootloader 3.9 and Bootloader 4.6 and save them somewhere you can remember. Connect you iPhone to the Computer/Laptop (if it isn’t already), then continue. QuickPwn will search for the 2.2.1 IPSW file(which is the upgrade) on your laptop/computer. Since you have already downloaded it from iTunes in Step1, let it continue. In the Checkbox, select “Cydia”, “Installer” and “Unlock my iPhone”
3. Next choose the Bootloader Files (you will get a browse option). Now is the main part, don’t worry is you get it wrong, you will get several tries for this. Follow the on-screen instructions and Voila!! Your iPhone is unlocked! (and jailbroken)
PS. All you have to do now, is wait, it will take about 1 hour for the iPhone to set up itself.