Unlock code to use

Unlock an iPod Model A1199
Although the second generation iPod Nano (also known as 2G) uses a four-digit pass code that prevents unauthorized access to your iPod by locking the screen, you can also unlock the device by plugging it into your computer's USB 2.0 port.
When the 2G iPod Nano is connected to the computer it is synchronized, and automatically unlocks the screen according to the official Apple site.
In order to successfully unlock the Nano it must be plugged into the primary computer used for synchronizing content.

Click "Start," "All Programs" and "iTunes" on your PC's desktop, or click "iTunes" on the Macintosh's desktop dock.
Plug the iPod Nano's cable into the docking port on the iPod Nano.
Plug the other end into the USB port on the computer to open iTunes.
Click "Controls" at the top of the iTunes' menu, and select "Eject iPod."
The iPod Nano's screen will be unlocked once it is ejected from your computer.

Manual Guide download
http://manuals.info.apple.com/en_US/iPod_nano_2nd_Gen_Features_Guide.pdf
Unlock an iPod Nano Code
With the latest iPod Nano model, you can set a four-digit code and lock all intruders from accessing your iPod.
In order to use the device's functions again, you need to enter the correct code.
However, if you happen to lose or forget the code, you will need to find another way to unlock your iPod Nano.

Plug the iPod USB cable into the bottom of your iPod Nano.
Plug the other end of the USB cable into a free USB port on your Mac or PC computer.
Open the iTunes program by using the Dock on a Mac or the Start menu on a PC.
Select your iPod Nano from the "Devices" list in the main iTunes window.
Click on the "Sync" button to make a connection between your computer and your iPod Nano.
Click on the "Eject" symbol once the syncing process is complete.
Remove your iPod Nano from the USB cable.
The iPod's lock code will now be reset and you will be able to access all features again.
Navigate to the "Screen Lock" option in the iPod menu to lock your iPod's screen again.
Since your iPod's lock code was just reset, you will be prompted to select a new four-digit code.


iPod Support
http://www.apple.com/support/ipod/

hi there, try resetting the iPod and it should unlock.

Use the computer that you originally used, and open up itunes this should allow you to reset the password and resync your data. If you use a computer that was not used to sync it you will be able to unlock it but the ipod will be wiped.

I IV PUT MY IPOD IN TO MY PC BUT I DONT KNOW HOW TO DOWN LOAD SONG FROM MY PC TO MY IPOD

You can follow this link it will give the details of ipod screen lock http://support.apple.com/kb/HT1350

Hi!

To unlock you ipod you can connect your ipod to the computer it was last synced with and click on restore options. it will restore the factory settings and will clear all the saved data in your ipod. This is the only way you can unlock it.

Please rate this solution.

Thanks
Rylee

more info will be helpful,

is it locked with the lock feature ?
or frozen?

if it's the lock feature u have to use itunes to unlock the nano.

if it's a screen lock just connect it to your primary computer and disconnect again

* your primary computer is the computer you used when you first installed it

connect the ipod to your computer and start itunes. it will automatically unlock it and will also allow you to chane the code or disable it.

my ipod asks me to enter a code and i dont know it