Google introduced Android Device Manager to track your lost smartphones

Google introduced Android Device Manager for every Android smartphone users to find misplaced (or) stolen smartphones.

When you misplaced your Android phone on like home, office or some other phones Android Device Manager lets you quickly ring your phone at maximum volume even if it's in silent mode. And also you can know the exact location of the phone using Map in real time. So you can find your misplaced phone easily and quickly with Android Device Manager feature.

And if your phone has been stolen and can't be recovered it, you can quickly and securely erase all of your important data on your device with Android Device Manager. 

According to Android blog post "This service will be available later this month on devices running Android 2.2 or above; to use it, you also will need to be signed into your Google Account." 

And also you can download 5 best Anti-theft Android apps here.