Google announced a new locator feature for Android devices called Android Device Manager. This app helps owners to find their lost, missing or stolen phones or tablets. This feature is very much similar to other locator apps like Lookout or Samsung's 'Find My Mobile'.
Enable Android Device Manager
On your Android device, go to Google Settings app and then tap on Android Device Manager. The locator feature on your device is already enabled by default, but in order to enable remote data wipe, tap on the "Allow remote factory reset" check box and then tap "Activate".
Android Device Manager
To use Android Device Manager, go to https://www.google.com/android/devicemanager and log in with your Google account. You will get a message box asking you for permission to allow Android Device Manager to use your device location data. Tap on the "Accept" button to continue.
>Location: This shows the location of your Android device on the map, along with the place name, last used and last located details.
>Ring: If you lost your phone from your home or from a park ore something you can choose the ring option to ring your device from Android Device Manager. This will result your phone to ring for a couple of minutes at its highest volume. This feature will work even if it's set on silent or vibrate mode.
>Lock: Android Device Manager allows users to lock their android device remotely so that no one can access your data while you're trying to recover your lost or stolen device. To lock your device, click on the "Lock" option and enter your new password twice, then click the Lock button. Once the lock message is sent to your Android device, it will lock itself immediately.
>Erase Device: If you are sure that your device is stolen by somebody and you have important data that must not go into wrong hands you can remotely factory reset your phone and protect your personal data. Choose "Erase" to erase all your apps, photos, music, and settings from your device. If your device is offline when you send the "Erase" message, it will perform the reset immediately when it comes online.
Note: Once your device has been in factory reset mode, you will no longer be able to access you phone from the Android Device Manager. So the best way that I recommend is to lock your device with new password.