A small guide on how to put your iPod touch / iPhone into DFU mode. Works with all G’s of iPod touch / iPhone
What is DFU: Device Firmware Upgrade
Step 1: Turn off your iPod touch / iPhone completely and connect to PC / mac
Step 2: Hold down the Power button for 3 seconds
Step 3: Without releasing the power button, also hold the Home button for 10 seconds
Step 4: Without releasing the home button, release the power button and keep holding the Home button for 20 seconds.
Itunes will identify that you are in DFU mode.