For Getting it just go the http://www.symantec-norton.com/Norton_Mobile_Security_2012_p116.aspx
and click on Download Securely now Add Norton zone 5gb free in your cart And Most Important step Apply coupon code.

STAY_SAFE_NAM

and click apply .Now you see in the page the final billing price is zero.
Now fill US detail (take google help).Continue to secure checkout Add any billing address
Untick , renew my subscription automatically ,When you click ok .you have done all the process you will see in the page your product key and also Product key will be sent to email.Download norton Mobile security from Dashboard or google play store
and fill the Product key in software. Use key to get 1 year free subscription.