Thank you for posting your inquiry about the Trend Micro vault.
To answer your question, the Trend Micro vault helps keep your sensitive files secure. With it, you can do the following:
Easily block casual access to files in the vault.
Seal the vault completely if your computer is lost or stolen.
The feature can only be used and activated on Windows PC. You can refer to this link for more information for the Trend Micro Vault.
For finding your smart phone, a different feature of the app is capable of finding it. This feature is called the Lost Device Protection. Lost device protection will help you locate your mobile devices once itis lost. You can refer to this page: Using the Lost Device Protection feature in Mobile Security for Android for more information regarding the feature
I hope this post helps you in your inquiries. Please feel free to post here anythime for any concerns regarding Trend Micro