Recently google announced the Android Device manager for pc through you can locate your lost device's.Now the Android Device Manager is available as a App for you android phone so you can directly locate your device's on your phone this what Google say about the App.
DescriptionEver misplaced or lost your phone? Android Device Manager locates lost devices and helps you keep your device—and the data inside it—safe and secure. Android Device Manager lets you:
● Locate Android devices associated with your Google account
● Reset your device's screen lock PIN
● Erase all data on the phone
P.s if you haven't yet setup the Android Device Manager then Get it from the Google Play Store using this Link