Google’s latest update to Android Device Manager enables remote password locking, overrides the built-in password-based security, making sure your data doesn’t fall into wrong hands. A lock request will immediately secure any device connected to Wi-Fi or a cellular network, even if it’s actively being used. If a thief has turned off a phone or enabled Airplane Mode, the lock will take effect as soon as a data connection is reestablished. You can hit the Ring button, making your Android device ring at the maximum volume even if your phone is on silent.
Source: https://thehackernews.com/2013/09/android-device-manager-allows-user-to.html