Make yourself aware of the notes and the steps required for the tools to remotely locate and factory reset your registered phone and/or tablet.
You can select the following options:
Ring. Ring your device at full volume for 5 minutes - even if it’s set to silent or vibrate.
Erase Device. Perform a factory reset, which permanently deletes all of your data.
Note from Android Device Manager help:
If your device is offline, Android Device Manager won't be able to ring or erase the device until there is a mobile data or Wi-Fi connection. Select Erase Device in advance and your device's data is deleted when it is back online. Android Device Manager does not work for devices that are powered off.
If you have been using Lookout (for Android / for iPhone/iPad), you can already do this from the Lookout site or via the Lookout Chrome App. An additional feature offered by Lookout is Signal Flare, which saves the phone's location when the battery is low.
And users of the many Android mobile security apps have a diverse group of features depending on your preferences.
So have you activated your Android Device Manager yet? If not, what is your favorite mobile security app?