How do I unlock my iPod if I forgot my passcode
I put a new passcode on my iPod and i forgot what it was and my iPod is now disabled. How can I fix this?
iPod touch, 4th Generation 8GB
Place the iOS device in Recovery Mode and then connect to your computer and restore via iTunes. The iPod will be erased.
iOS: Wrong passcode results in red disabled screen
If recovery mode does not work try DFU mode.
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings