Google has just updated the Android Device Manager app to locate, ring, lock, and erase data on your lost device from another person’s Android device or a PC. This handy new feature will make it easier to protect your data if ever your phone gets stolen. You just need to tap on the drop-down menu at the top of the app and select Guest user. If you don’t have this feature yet, the update should be coming to your device soon.
Source: Android Police