How to Downgrade iPhone Firmware 3.0 to 2.2.1

1. Connect your iPhone to your Mac or PC and select your iPhone from the list of devices in iTunes

2. If iTunes does not detect your iPhone then you will need to put it in DFU (Device Firmware Upgrade) mode.

3. Browse the Summary Tab,

Mac Users,

Hold down Option and press the “Restore” button

Windows Users,

Hold down Shift and press the Restore button

4. Now browse the folder where you have the iPhone firmware.Select the firmware & hit the restore button and cross your fingers for 5 minutes.

5. Ignore error message like 1011, 1013, 1015 (Actually the firmware 2.2.1 is already successfully installed)
6.Use QuickPWN 2.2.5 to Jailbreak iPhone Firmware 2.2.1
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